Office365DnsChecker.psm1
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#Requires -Version 5.1 #for automatic variables to detect the OS. # Set strict mode. Set-StrictMode -Version Latest Function Test-Office365DNSRecords { #.ExternalHelp Office365DnsChecker.psm1-Help.xml [CmdletBinding()] Param( [Parameter(Mandatory, ValueFromPipeline)] [Alias("Name")] [ValidateNotNullOrEmpty()] [String[]] $DomainName ) Process { $DomainName | ForEach-Object { Write-Output "Checking Office 365 DNS records for $_." Test-AzureADRecords -DomainName $_ | Out-Null Test-ExchangeOnlineRecords -DomainName $_ | Out-Null Test-TeamsRecords -DomainName $_ | Out-Null } } } #region Helper cmdlets Function Resolve-DNSNameCrossPlatform { Param( [Parameter(Mandatory, Position=0, ValueFromPipeline)] [ValidateNotNullOrEmpty()] [String] $Name, [Parameter(Mandatory, Position=1)] [ValidateSet("CNAME", "MX", "SRV", "TXT")] [String] $Type ) Write-Verbose "Performing a DNS lookup for $Name ($Type)." # Check and see if the Resolve-DnsName cmdlet is available. # On Windows (Desktop and Core), it is available, and we can use it. If (Get-Command Resolve-DnsName -ErrorAction SilentlyContinue) { $dnsLookup = Resolve-DnsName -Name $Name -Type $Type -ErrorAction SilentlyContinue If (-Not $dnsLookup) { Write-Debug "DNS record not found." Return $null } Switch ($Type) { "CNAME" { # For whatever reason, CNAME lookups are returned as a [DnsRecord_PTR] type. Go figure. Return $dnsLookup | Where-Object {$_ -Is [Microsoft.DnsClient.Commands.DnsRecord_PTR]} } "MX" { Return $dnsLookup | Where-Object {$_ -Is [Microsoft.DnsClient.Commands.DnsRecord_MX]} } "SRV" { Return $dnsLookup | Where-Object {$_ -Is [Microsoft.DnsClient.Commands.DnsRecord_SRV]} } "TXT" { Return $dnsLookup | Where-Object {$_ -Is [Microsoft.DnsClient.Commands.DnsRecord_TXT]} } } Return } # If Resolve-DnsName is not available, we need to use the system's copy of dig, # and try to emulate the style of output that Resolve-DnsName creates. Else { # Remove empty results. $dnsLookup = $(/usr/bin/dig -t $Type +short $Name) | Where-Object {$_ -ne ""} If (-Not $dnsLookup) { Write-Debug "DNS record not found." } # To mimic Resolve-DnsName, return results as custom objects with the same properties. # For brevity, I'm only implementing the types and members that this module will use. Switch ($Type) { "CNAME" { $CNAMEs = @() $dnsLookup | ForEach-Object { Write-Debug "$Name is a CNAME for $_" $CNAMEs += [PSCustomObject]@{ # dig always returns fully-qualified hostnames. # Strip that trailing dot to return results like Resolve-DnsName does. "NameHost" = $_ -Replace [RegEx]"\.$" } } Return $CNAMEs } "MX" { $MXs = @() $dnsLookup | ForEach-Object { $split = -Split $_ Write-Debug "$Name has the MX record $($split[1]) ($($split[0]))." $MXs += [PSCustomObject]@{ # dig always returns fully-qualified hostnames. # Strip that trailing dot to return results like Resolve-DnsName does. "NameExchange" = $split[1] -Replace [RegEx]"\.$" "Priority" = $split[0] -As [Int] } } Return $MXs | Sort-Object Priority } "SRV" { $SRVs = @() $dnsLookup | ForEach-Object { $splits = -Split $_ # dig always returns fully-qualified hostnames. # Strip that trailing dot to return results like Resolve-DnsName does. $NameTarget = $splits[3] -Replace [RegEx]"\.$" $Priority = $splits[0] -As [Int] $Weight = $splits[1] -As [Int] $Port = $splits[2] -As [Int] Write-Debug "$Name has a SRV record for ${NameTarget}:$Port (priority=$Priority, weight=$Weight)." $SRVs += [PSCustomObject]@{ "Priority" = $Priority "Weight" = $Weight "Port" = $Port "NameTarget" = $NameTarget } } Return $SRVs | Sort-Object Priority, Weight } "TXT" { $TXTs = @() $dnsLookup | ForEach-Object { Write-Debug "$Name has the TXT record: $_" $TXTs += [PSCustomObject]@{ # dig wraps TXT records in quotes. # We need to remove those to emulate Resolve-DnsName. "Strings" = ($_ -Replace "^`"" -Replace "`"$") } } Return $TXTs } } } } Function Write-Success { Param( [Parameter(Position=0)] [Alias("Object")] [String] $Message, [String] $Product ) If ($Product) { Write-Host -ForegroundColor Green -Object "SUCCESS: ${Product}: $Message" } Else { Write-Host -ForegroundColor Green -Object "SUCCESS: $Message" } } #endregion Helper cmdlets #region Azure AD cmdlets Function Test-AzureADRecords { #.ExternalHelp Office365DnsChecker.psm1-Help.xml Param( [Parameter(Mandatory, ValueFromPipeline)] [Alias("Name")] [ValidateNotNullOrEmpty()] [String[]] $DomainName ) Process { $DomainName | ForEach-Object { Test-AzureADClientConfigurationRecord -DomainName $_ Test-AzureADEnterpriseEnrollmentRecord -DomainName $_ Test-AzureADEnterpriseRegistrationRecord -DomainName $_ } } } Function Test-AzureADClientConfigurationRecord { [CmdletBinding()] Param( [Parameter(Mandatory, ValueFromPipeline)] [Alias("Name")] [ValidateNotNullOrEmpty()] [String[]] $DomainName ) Begin { $shouldBe = "clientconfig.microsoftonline-p.net" } Process { $DomainName | ForEach-Object { Write-Output "Checking client configuration record for $_" $record = "msoid.$_" $dnsLookup = Resolve-DnsNameCrossPlatform -Type CNAME -Name $record If (-Not $dnsLookup) { $errorReport = @{ Message = "The client configuration DNS record is missing." Category = [System.Management.Automation.ErrorCategory]::ObjectNotFound CategoryReason = "The CNAME record $record does not exist." CategoryTargetName = $record CategoryTargetType = "CNAME" ErrorID = "MsoidCnameMissing" RecommendedAction = "Create a CNAME record for $record, pointing to $shouldBe." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } ElseIf ($dnsLookup.NameHost -ne $shouldBe) { $errorReport = @{ Message = "The client configuration DNS record exists, but is not correct." Category = [System.Management.Automation.ErrorCategory]::InvalidData CategoryReason = "The CNAME record $record was found, but points to the wrong target." CategoryTargetName = $record CategoryTargetType = "CNAME" ErrorID = "MsoidCnameIncorrect" RecommendedAction = "Change the CNAME record $record to point to $shouldBe." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } Else { Write-Success -Product "Azure AD" "The client configuration CNAME record is correct." } } } } Function Test-AzureADEnterpriseEnrollmentRecord { #.ExternalHelp Office365DnsChecker.psm1-Help.xml Param( [Parameter(Mandatory, ValueFromPipeline)] [Alias("Name")] [ValidateNotNullOrEmpty()] [String[]] $DomainName ) Begin { $shouldBe = "enterpriseenrollment.manage.microsoft.com" } Process { $DomainName | ForEach-Object { Write-Output "Checking AAD enterprise enrollment record for $_" $record = "enterpriseenrollment.$_" $dnsLookup = Resolve-DnsNameCrossPlatform -Type CNAME -Name $record If (-Not $dnsLookup) { $errorReport = @{ Message = "The enterprise enrollment DNS record is missing." Category = [System.Management.Automation.ErrorCategory]::ObjectNotFound CategoryReason = "The DNS record $record was not found." CategoryTargetName = $record CategoryTargetType = "CNAME" ErrorID = "EnterpriseEnrollmentCnameMissing" RecommendedAction = "Create a CNAME record for $record, pointing to $shouldBe." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } ElseIf ($dnsLookup.NameHost -ne $shouldBe) { $errorReport = @{ Message = "The enterprise enrollment DNS record exists, but is not correct." Category = [System.Management.Automation.ErrorCategory]::InvalidData CategoryReason = "The DNS record $record was found, but not correct." CategoryTargetName = $record CategoryTargetType = "CNAME" ErrorID = "EnterpriseEnrollmentCnameIncorrect" RecommendedAction = "Change the CNAME record $record to point to $shouldBe." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } Else { Write-Success -Product "Azure AD" "The enterprise enrollment DNS record is correct." } } } } Function Test-AzureADEnterpriseRegistrationRecord { #.ExternalHelp Office365DnsChecker.psm1-Help.xml Param( [Parameter(Mandatory, ValueFromPipeline)] [Alias("Name")] [ValidateNotNullOrEmpty()] [String[]] $DomainName ) Begin { $shouldBe = "enterpriseregistration.windows.net" } Process { $DomainName | ForEach-Object { Write-Output "Checking AAD enterprise registration record for $_" $record = "enterpriseregistration.$_" $dnsLookup = Resolve-DnsNameCrossPlatform -Type CNAME -Name $record If (-Not $dnsLookup) { $errorReport = @{ Message = "The enterprise registration DNS record is missing." Category = [System.Management.Automation.ErrorCategory]::ObjectNotFound CategoryReason = "The CNAME record $record does not exist." CategoryTargetName = $record CategoryTargetType = "CNAME" ErrorID = "EnterpriseRegistrationCnameMissing" RecommendedAction = "Create a CNAME record for $record, pointing to $shouldBe." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } ElseIf ($dnsLookup.NameHost -ne $shouldBe) { $errorReport = @{ Message = "The enterprise registration DNS record exists, but is not correct." Category = [System.Management.Automation.ErrorCategory]::InvalidData CategoryReason = "The CNAME record $record exists, but does not point to the correct target." CategoryTargetName = $record CategoryTargetType = "CNAME" ErrorID = "EnterpriseRegistrationCnameIncorrect" RecommendedAction = "Change the CNAME record $record to point to $shouldBe." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } Else { Write-Success -Product "Azure AD" "The enterprise registration DNS record is correct." } } } } #endregion Azure AD cmdlets #region Exchange Online cmdlets Function Test-ExchangeOnlineRecords { #.ExternalHelp Office365DnsChecker.psm1-Help.xml Param( [Parameter(Mandatory, ValueFromPipeline)] [Alias("Name")] [ValidateNotNullOrEmpty()] [String[]] $DomainName, [Switch] $GroupByRecord ) Process { $DomainName | ForEach-Object { Test-ExchangeOnlineMxRecord -DomainName $_ Test-ExchangeOnlineAutodiscoverRecord -DomainName $_ Test-ExchangeOnlineSpfRecord -DomainName $_ Test-ExchangeOnlineSenderIdRecord -DomainName $_ Test-ExchangeOnlineDkimRecords -DomainName $_ } } } Function Test-ExchangeOnlineAutodiscoverRecord { #.ExternalHelp Office365DnsChecker.psm1-Help.xml Param( [Parameter(Mandatory, ValueFromPipeline)] [Alias("Name")] [ValidateNotNullOrEmpty()] [String] $DomainName ) Begin { $shouldBe = "autodiscover.outlook.com" } Process { $DomainName | ForEach-Object { Write-Output "Checking Exchange Autodiscover records for $_" $record = "autodiscover.$_" $dnsLookup = Resolve-DNSNameCrossPlatform -Type CNAME -Name $record If (-Not $dnsLookup) { $errorReport = @{ Message = "The Autodiscover DNS CNAME record is missing." Category = [System.Management.Automation.ErrorCategory]::ObjectNotFound CategoryReason = "The CNAME record $record does not exist." CategoryTargetName = $record CategoryTargetType = "CNAME" ErrorID = "AutodiscoverCnameMissing" RecommendedAction = "Create a CNAME record for $record, pointing to $shouldBe." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } ElseIf ($dnsLookup.NameHost -ne $shouldBe) { $errorReport = @{ Message = "The Autodiscover DNS CNAME record exists, but is not correct." Category = [System.Management.Automation.ErrorCategory]::InvalidData CategoryReason = "The CNAME record $record was found, but points to the wrong target." CategoryTargetName = $record CategoryTargetType = "CNAME" ErrorID = "AutodiscoverCnameMissing" RecommendedAction = "Change the CNAME record $record to point to $shouldBe." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } Else { Write-Success -Product "Exchange Online" "The Autodiscover DNS CNAME record is correct." } $record = "_autodiscover._tcp.$_" $dnsLookup = Resolve-DnsNameCrossPlatform -Type SRV -Name $record If ($dnsLookup) { $errorReport = @{ Message = "One or more Autodiscover DNS SRV records exist." Category = [System.Management.Automation.ErrorCategory]::ResourceExists CategoryReason = "The SRV record $record was found, but should not exist. They are not compatible with Exchange Online." CategoryTargetName = $record CategoryTargetType = "SRV" ErrorID = "AutodiscoverSrvExists" RecommendedAction = "Delete all SRV records for $record." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } Else { Write-Success -Product "Exchange Online" -Message "An Autodiscover DNS SRV record does not exist." } } } } Function Test-ExchangeOnlineDkimRecords { #.ExternalHelp Office365DnsChecker.psm1-Help.xml Param( [Parameter(Mandatory, ValueFromPipeline)] [Alias("Name")] [ValidateNotNullOrEmpty()] [String[]] $DomainName, [ValidateNotNullOrEmpty()] [ValidateSet(1,2)] [Int[]] $Selectors = @(1,2) ) Process { $DomainName | ForEach-Object { Write-Output "Checking Exchange Online DKIM records for $_" $domain = $_ ForEach ($i in $Selectors) { $record = "selector$i._domainkey.$domain" $dnsCnameLookup = Resolve-DnsNameCrossPlatform -Type CNAME -Name $record $shouldBeLike = "selector$i-*.onmicrosoft.com" If (-Not $dnsCnameLookup) { $errorReport = @{ Message = "The DKIM CNAME record for selector$i is missing." Category = [System.Management.Automation.ErrorCategory]::ObjectNotFound CategoryReason = "The DNS record $record was not found." CategoryTargetName = $record CategoryTargetType = "CNAME" ErrorID = "DkimSelector${i}CnameMissing" RecommendedAction = "Create a CNAME record for $record. Look in the Exchange Admin Center to find the target." TargetObject = $dnsCnameLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } ElseIf ($dnsCnameLookup.NameHost -NotLike $shouldBeLike) { $errorReport = @{ Message = "The DKIM CNAME record for selector$i exists, but is incorrect." Category = [System.Management.Automation.ErrorCategory]::InvalidData CategoryReason = "The DNS record $record was found, but incorrect." CategoryTargetName = $record CategoryTargetType = "CNAME" ErrorID = "DkimSelector${i}CnameIncorrect" RecommendedAction = "Change the CNAME record $record to point to the correct name, usually `"contoso-com._domainkey.contoso.onmicrosoft.com`". Look in the Exchange Admin Center to find the exact target." TargetObject = $dnsCnameLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } Else { $dnsTxtLookup = Resolve-DnsNameCrossPlatform -Type TXT -Name $record | Where-Object {$_.Strings -NotMatch [RegEx]"onmicrosoft\.com\.?$"} $shouldBeLike = "v=DKIM1;*" If (-Not $dnsTxtLookup) { $errorReport = @{ Message = "The DKIM TXT record for selector$i is missing." Category = [System.Management.Automation.ErrorCategory]::ObjectNotFound CategoryReason = "The DNS TXT record $record was not found." CategoryTargetName = $record CategoryTargetType = "TXT" ErrorID = "DkimSelector${i}TxtMissing" RecommendedAction = "Use the Exchange Admin Center or New-DkimSigningConfig to generate a new key pair." TargetObject = $dnsTxtLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } ElseIf (($dnsTxtLookup | Measure-Object | Select-Object -ExpandProperty Count) -gt 1) { $errorReport = @{ Message = "Multiple DKIM TXT records for selector$i were found." Category = [System.Management.Automation.ErrorCategory]::InvalidData CategoryReason = "The DNS TXT record that $record points to was found, but returned multiple records." CategoryTargetName = $record CategoryTargetType = "TXT" ErrorID = "DkimSelector${i}TxtTooManyResults" RecommendedAction = "Try regenerating the DKIM key." TargetObject = $dnsTxtLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } ElseIf ($dnsTxtLookup[0].Strings -NotLike $shouldBeLike) { $errorReport = @{ Message = "The DKIM TXT record for selector$i is not a valid key." Category = [System.Management.Automation.ErrorCategory]::InvalidData CategoryReason = "The DNS TXT record that $record points to was found, but is not a valid DKIM key." CategoryTargetName = $record CategoryTargetType = "TXT" ErrorID = "DkimSelector${i}TxtIncorrect" RecommendedAction = "Regenerate the DKIM key." TargetObject = $dnsTxtLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } Else { Write-Success -Product "Exchange Online" "The DKIM key selector$i appears to be correct." } } } } } } Function Test-ExchangeOnlineMxRecord { #.ExternalHelp Office365DnsChecker.psm1-Help.xml Param( [Parameter(Mandatory, ValueFromPipeline)] [Alias("Name")] [ValidateNotNullOrEmpty()] [String[]] $DomainName ) Process { $DomainName | ForEach-Object { Write-Output "Checking MX records for $_" $dnsLookup = $null # this is to not upset StrictMode. $dnsLookup = Resolve-DnsNameCrossPlatform -Type MX $_ If (-Not $dnsLookup) { $errorReport = @{ Message = "No MX records were found for the domain $_." Category = [System.Management.Automation.ErrorCategory]::ObjectNotFound CategoryReason = "The MX record for $_ was not found." CategoryTargetName = $_ CategoryTargetType = "MX" ErrorID = "MxRecordMissing" RecommendedAction = "Add an MX record for $_. The mail exchanger should be the value you see in the Microsoft 365 Admin Center (usually `"contoso-com.mail.protection.outlook.com`")." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } ElseIf (($dnsLookup | Measure-Object | Select-Object -ExpandProperty Count) -eq 1) { Write-Success -Product "Exchange Online" "Exactly one MX record was found for the domain $_." } Else { Write-Warning "More than one MX record was found for the domain $_." $dnsLookup | ForEach-Object {Write-Debug $_} } If ($null -ne $dnsLookup) { If ($dnsLookup[0].NameExchange -Like "*.mail.protection.outlook.com") { Write-Success -Product "Exchange Online" "The first MX record for the domain $_ appears correct." } Else { Write-Warning "The first MX record for the doamin $_ does not appear to be correct. If you are using a third-party spam filter, this is normal." } } } } } Function Test-ExchangeOnlineSenderIdRecord { #.ExternalHelp Office365DnsChecker.psm1-Help.xml Param( [Parameter(Mandatory, ValueFromPipeline)] [Alias("Name")] [ValidateNotNullOrEmpty()] [String[]] $DomainName ) Test-ExchangeOnlineSpfRecord -DomainName $DomainName -SpfOrSenderID "Sender ID" } Function Test-ExchangeOnlineSpfRecord { #.ExternalHelp Office365DnsChecker.psm1-Help.xml [CmdletBinding()] Param( [Parameter(Mandatory, ValueFromPipeline)] [Alias("Name")] [ValidateNotNullOrEmpty()] [String[]] $DomainName, [ValidateSet("SPF", "Sender ID")] [String] $SpfOrSenderID = "SPF" ) Begin { If ($SpfOrSenderID -eq "SPF") { $ErrorCode = "Spf" } Else { $ErrorCode = "SenderId" } } Process { $DomainName | ForEach-Object { Write-Output "Performing $SpfOrSenderId checks for $_." $dnsLookup = Resolve-DnsNameCrossPlatform -Type TXT -Name $_ | Where-Object { # As per the RFC's, all SPF/Sender ID tokens are case-insensitive. ($_.Strings -Like "v=spf1 *" -and $SpfOrSenderId -Eq "SPF") -or ` ($_.Strings -Like "spf2.0/*" -and $SpfOrSenderId -Eq "Sender ID") } If (-Not $dnsLookup) { # Sender ID records are pretty much non-existent. # If we don't find one, don't bother showing an error. If ($SpfOrSenderID -eq "Sender ID") { Write-Verbose "No Sender ID record was found. This is fine." } Else { $errorReport = @{ Message = "No SPF TXT record was found." Category = [System.Management.Automation.ErrorCategory]::ObjectNotFound CategoryReason = "No SPF TXT record could be found for the domain $_." CategoryTargetName = $_ CategoryTargetType = "TXT" ErrorID = "SpfRecordMissing" RecommendedAction = "Create an SPF TXT record for $_." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } } ElseIf (($dnsLookup | Measure-Object | Select-Object -ExpandProperty Count) -gt 1) { Write-Warning "More than one $SpfOrSenderID record was found. Anti-spam filters' behavior may not be as expected." Write-Verbose "Only the first $SpfOrSenderID record will be evaluated." } Else { Write-Success -Product "Exchange Online" "Exactly one $SpfOrSenderID record was found." $tokens = -Split ($dnsLookup[0].Strings) $correctToken = "include:spf.protection.outlook.com" If ($correctToken -In $tokens -or "+$correctToken" -In $tokens) { Write-Success -Product "Exchange Online" "The correct $SpfOrSenderID passing token was found" } ElseIf ("-$correctToken" -In $Tokens) { $errorReport = @{ Message = "The $SpfOrSenderID token was found, but marked as a hard failure." Category = [System.Management.Automation.ErrorCategory]::InvalidData CategoryReason = "The token -$correctToken was found in the $SpfOrSenderID record, which fails all mail from Exchange Online." CategoryTargetName = "-$correctToken" CategoryTargetType = "${ErrorCode}Token" ErrorID = "${ErrorCode}RecordExchangeOnlineSetToHardFail" RecommendedAction = "In the $SpfOrSenderID record, remove the leading '-' before $correctToken." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } ElseIf ("~$correctToken" -In $tokens) { $errorReport = @{ Message = "The $SpfOrSenderID token was found, but marked as a soft failure." Category = [System.Management.Automation.ErrorCategory]::InvalidData CategoryReason = "The token ~$correctToken was found in the $SpfOrSenderID record, which may fail all mail from Exchange Online." CategoryTargetName = "~$correctToken" CategoryTargetType = "${ErrorCode}Token" ErrorID = "${ErrorCode}RecordExchangeOnlineSetToSoftFail" RecommendedAction = "In the $SpfOrSenderID record, remove the leading '~' before $correctToken." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } ElseIf ("-$correctToken" -In $tokens) { $errorReport = @{ Message = "The $SpfOrSenderID token was found, but marked as neutral." Category = [System.Management.Automation.ErrorCategory]::InvalidData CategoryReason = "The token ?$correctToken was found in the $SpfOrSenderID record, which makes no assertion about mail from Exchange Online." CategoryTargetName = "?$correctToken" CategoryTargetType = "${ErrorCode}Token" ErrorID = "${ErrorCode}RecordExchangeOnlineSetToNeutral" RecommendedAction = "In the $SpfOrSenderID record, remove the leading '?' before $correctToken." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } Else { $errorReport = @{ Message = "The $SpfOrSenderID record was found, but is missing the token for Exchange Online." Category = [System.Management.Automation.ErrorCategory]::ObjectNotFound CategoryReason = "The token $correctToken was not found in the SPF record." CategoryTargetName = $_ CategoryTargetType = "TXT" ErrorID = "${ErrorCode}RecordExchangeOnlineMissing" RecommendedAction = "Add the token $correctToken to the $SpfOrSenderID record." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } } } } } #endregion Exchange Online cmdlets #region Teams/Skype for Business Online cmdlets Function Test-TeamsRecords { #.ExternalHelp Office365DnsChecker.psm1-Help.xml [CmdletBinding()] Param( [Parameter(Mandatory, ValueFromPipeline)] [Alias("Name")] [ValidateNotNullOrEmpty()] [String[]] $DomainName ) Process { $DomainName | ForEach-Object { Test-TeamsAutodiscoverRecord -DomainName $_ Test-TeamsSipCnameRecord -DomainName $_ Test-TeamsSipSrvRecord -DomainName $_ Test-TeamsSipFederationSrvRecord -DomainName $_ } } } New-Alias -Option Constant -Value "Test-TeamsRecords" -Name "Test-LyncRecords" New-Alias -Option Constant -Value "Test-TeamsRecords" -Name "Test-SkypeForBusinessRecords" New-Alias -Option Constant -Value "Test-TeamsRecords" -Name "Test-SkypeForBusinessOnlineRecords" Function Test-TeamsAutodiscoverRecord { #.ExternalHelp Office365DnsChecker.psm1-Help.xml Param( [Parameter(Mandatory, ValueFromPipeline)] [Alias("Name")] [ValidateNotNullOrEmpty()] [String[]] $DomainName ) Begin { $shouldBe = "webdir.online.lync.com" } Process { $DomainName | ForEach-Object { Write-Output "Verifying the Teams/Skype autodiscover record for $_" $dnsLookup = Resolve-DnsNameCrossPlatform -Type CNAME -Name "lyncdiscover.$_" -ErrorAction SilentlyContinue If (-Not $dnsLookup) { $errorReport = @{ Message = "The Skype/Teams Autodiscover DNS record is missing." Category = [System.Management.Automation.ErrorCategory]::ObjectNotFound CategoryReason = "The CNAME record lyncdiscover.$_ does not exist." CategoryTargetName = "lyncdiscover.$_" CategoryTargetType = "CNAME" ErrorID = "LyncDiscoverCnameMissing" RecommendedAction = "Create a CNAME record for lyncdiscover.$_, pointing to $shouldBe." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } ElseIf ($dnsLookup.NameHost -ne $shouldBe) { Write-Warning -Message "The Skype/Teams autodiscover DNS record exists, but is not correct. This may be intentional, if you have a Skype for Business Server deployment." } Else { Write-Success -Product "Teams/Skype" "The autodiscover DNS record is correct." } } } } New-Alias -Option Constant -Value "Test-TeamsAutodiscoverRecord" -Name "Test-LyncDiscoverRecord" New-Alias -Option Constant -Value "Test-TeamsAutodiscoverRecord" -Name "Test-LyncAutodiscoverRecord" New-Alias -Option Constant -Value "Test-TeamsAutodiscoverRecord" -Name "Test-SkypeForBusinessAutodiscoverRecord" New-Alias -Option Constant -Value "Test-TeamsAutodiscoverRecord" -Name "Test-SkypeForBusinessOnlineAutodiscoverRecords" Function Test-TeamsSipCnameRecord { #.ExternalHelp Office365DnsChecker.psm1-Help.xml Param( [Parameter(Mandatory, ValueFromPipeline)] [Alias("Name")] [ValidateNotNullOrEmpty()] [String[]] $DomainName ) Begin { $shouldBe = "sipdir.online.lync.com" } Process { $DomainName | ForEach-Object { Write-Output "Checking the SIP CNAME record for $_" $record = "sip.$_" $dnsLookup = Resolve-DnsNameCrossPlatform -Type CNAME -Name $record If (-Not $dnsLookup) { $errorReport = @{ Message = "The SIP DNS CNAME record is missing for $_." Category = [System.Management.Automation.ErrorCategory]::ObjectNotFound CategoryReason = "The CNAME record $record does not exist." CategoryTargetName = $record CategoryTargetType = "CNAME" ErrorID = "SipCnameMissing" RecommendedAction = "Create a CNAME record for $record, pointing to $shouldBe." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } ElseIf ($dnsLookup.NameHost -ne $shouldBe) { Write-Warning -Message "The SIP CNAME record exists for $_, but is not correct. This may be intentional, if you have a Skype for Business Server deployment." } Else { Write-Success -Product "Teams/Skype" "The SIP CNAME record is correct for $_." } } } } Function Test-TeamsSipFederationSrvRecord { #.ExternalHelp Office365DnsChecker.psm1-Help.xml Param( [Parameter(Mandatory, ValueFromPipeline)] [Alias("Name")] [ValidateNotNullOrEmpty()] [String[]] $DomainName ) Begin { $targetShouldBe = "sipfed.online.lync.com" $portShouldBe = 5061 } Process { $DomainName | ForEach-Object { $record = "_sipfederationtls._tcp.$_" $dnsLookup = Resolve-DnsNameCrossPlatform -Type SRV -Name $record If (-Not $dnsLookup) { $errorReport = @{ Message = "The SIP federation SRV record is missing." Category = [System.Management.Automation.ErrorCategory]::ObjectNotFound CategoryReason = "A SRV record for $record was not found." CategoryTargetName = $record CategoryTargetType = "SRV" ErrorID = "SipFederationSrvMissing" RecommendedAction = "Create a SRV record for $record (port $portShouldBe) pointing to $targetShouldBe." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } ElseIf (($dnsLookup | Measure-Object | Select-Object -ExpandProperty Count) -gt 1) { $errorReport = @{ Message = "Multiple SIP federation SRV records exist." Category = [System.Management.Automation.ErrorCategory]::InvalidData CategoryReason = "The SRV record $record returned multiple records." CategoryTargetName = $record CategoryTargetType = "SRV" ErrorID = "SipFederationSrvTooManyResults" RecommendedAction = "Delete any extra SRV records for $record." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } ElseIf ($dnsLookup[0].NameTarget -ne $targetShouldBe -or $dnsLookup[0].Port -ne $portShouldBe) { If ($dnsLookup[0].NameTarget -ne $targetShouldBe) { $errorReport = @{ Message = "The SIP federation SRV record was found, but has the incorrect target." Category = [System.Management.Automation.ErrorCategory]::InvalidData CategoryReason = "The DNS SRV record $record was found, but has the incorrect target." CategoryTargetName = $record CategoryTargetType = "SRV" ErrorID = "SipFederationSrvIncorrectTarget" RecommendedAction = "Change the SRV record for $record to point to $targetShouldBe." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } If ($dnsLookup[0].Port -ne $portShouldBe) { $errorReport = @{ Message = "The SIP federation SRV record was found, but has the incorrect port." Category = [System.Management.Automation.ErrorCategory]::InvalidData CategoryReason = "The DNS SRV record $record was found, but has the incorrect port." CategoryTargetName = $record CategoryTargetType = "SRV" ErrorID = "SipFederationSrvIncorrectPort" RecommendedAction = "Change the SRV record for $record to point to port $portShouldBe." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } } Else { Write-Success -Product "Teams/Skype" "The SIP federation SRV record is correct." } } } } New-Alias -Option Constant -Value "Test-TeamsSipFederationSrvRecord" -Name "Test-LyncSipFederationSrvRecord" New-Alias -Option Constant -Value "Test-TeamsSipFederationSrvRecord" -Name "Test-SkypeForBusinessSipFederationSrvRecord" New-Alias -Option Constant -Value "Test-TeamsSipFederationSrvRecord" -Name "Test-SkypeForBusinessOnlineSipFederationSrvRecord" Function Test-TeamsSipSrvRecord { #.ExternalHelp Office365DnsChecker.psm1-Help.xml Param( [Parameter(Mandatory, ValueFromPipeline)] [Alias("Name")] [ValidateNotNullOrEmpty()] [String[]] $DomainName ) Begin { $targetShouldBe = "sipdir.online.lync.com" $portShouldBe = 443 } Process { $DomainName | ForEach-Object { Write-Output "Checking the SIP/TLS service record for $_" $record = "_sip._tls.$_" $dnsLookup = Resolve-DnsNameCrossPlatform -Type SRV -Name $record If (-Not $dnsLookup) { $errorReport = @{ Message = "The SIP/TLS SRV record is missing." Category = [System.Management.Automation.ErrorCategory]::ObjectNotFound CategoryReason = "A SRV record for $record was not found." CategoryTargetName = $record CategoryTargetType = "SRV" ErrorID = "SipSrvMissing" RecommendedAction = "Create a SRV record for $record (port $portShouldBe) pointing to $targetShouldBe." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } ElseIf (($dnsLookup | Measure-Object | Select-Object -ExpandProperty Count) -gt 1) { $errorReport = @{ Message = "Multiple SIP/TLS SRV records exist." Category = [System.Management.Automation.ErrorCategory]::InvalidData CategoryReason = "The SRV record $record returned multiple records." CategoryTargetName = $record CategoryTargetType = "SRV" ErrorID = "SipSrvTooManyResults" RecommendedAction = "Delete any extra SRV records for $record." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } ElseIf ($dnsLookup[0].NameTarget -ne $targetShouldBe -or $dnsLookup[0].Port -ne $portShouldBe) { If ($dnsLookup[0].NameTarget -ne $targetShouldBe) { $errorReport = @{ Message = "The SIP/TLS SRV record was found, but has the incorrect target." Category = [System.Management.Automation.ErrorCategory]::InvalidData CategoryReason = "The DNS SRV record $record was found, but has the incorrect target." CategoryTargetName = $record CategoryTargetType = "SRV" ErrorID = "SipSrvIncorrectTarget" RecommendedAction = "Change the SRV record for $record to point to $targetShouldBe." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } If ($dnsLookup[0].Port -ne $portShouldBe) { $errorReport = @{ Message = "The SIP/TLS SRV record was found, but has the incorrect port." Category = [System.Management.Automation.ErrorCategory]::InvalidData CategoryReason = "The DNS SRV record $record was found, but has the incorrect port." CategoryTargetName = $record CategoryTargetType = "SRV" ErrorID = "SipSrvIncorrectPort" RecommendedAction = "Change the SRV record for $record to point to port $portShouldBe." TargetObject = $dnsLookup } Write-Error @errorReport Write-Information $errorReport.RecommendedAction } } Else { Write-Success -Product "Teams/Skype" "The SIP/TLS SRV record is correct." } } } } New-Alias -Option Constant -Value "Test-TeamsSipSrvRecord" -Name "Test-LyncSipSrvRecord" New-Alias -Option Constant -Value "Test-TeamsSipSrvRecord" -Name "Test-SkypeForBusinessSipSrvRecord" New-Alias -Option Constant -Value "Test-TeamsSipSrvRecord" -Name "Test-SkypeForBusinessOnlineSipSrvRecord" #endregion Teams/Skype for Business Online cmdlets |