Functions/Connect-ExchangeOnlineAdminAccount.ps1
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<#
.SYNOPSIS This function connects to Exchange Online using admin account credentials or a MSPComplete Endpoint. .DESCRIPTION This function connects to Exchange Online using admin account credentials or a MSPComplete Endpoint. It returns whether the connection and logon was successful. .EXAMPLE Connect-ExchangeOnlineAdminAccount -Endpoint $Endpoint .EXAMPLE $Endpoint | Connect-ExchangeOnlineAdminAccount .EXAMPLE Connect-ExchangeOnlineAdminAccount -Username $username -Password $password #> function Connect-ExchangeOnlineAdminAccount { param ( # The username of the Exchange Online admin account. [Parameter(Mandatory=$true, ParameterSetName="credential")] [string]$username, # The password of the Exchange Online admin account. [Parameter(Mandatory=$true, ParameterSetName="credential")] [SecureString]$password, # The MSPComplete Endpoint for the Exchange Online admin credentials. [Parameter(Mandatory=$true, ParameterSetName="endpoint", ValueFromPipeline=$true)] $endpoint, # The maximum number of logon attempts. Each logon attempt can take up to 60 seconds. [Parameter(Mandatory=$false)] [ValidateScript({ $_ -gt 1 })] [Int]$maximumAttempts = 5 ) # If given endpoint, retrieve username and password if ($PSCmdlet.ParameterSetName -eq "endpoint") { $exchangeCredential = $endpoint | Get-CredentialFromMSPCompleteEndpoint $username = $exchangeCredential.Username } # Create the Exchange Online credential from the given username and password else { $exchangeCredential = [PSCredential]::new($username, $password) } # Store the username used globally $Global:ExchangeOnlineUsername = $username # Logon to Exchange Online $attemptNum = 0 while ($true) { try { $exchangeSession = New-PSSession -ConfigurationName Microsoft.Exchange ` -ConnectionUri "https://outlook.office365.com/powershell-liveid/" ` -Credential $exchangeCredential -Authentication Basic -AllowRedirection -Name "ExchangeOnline" ` -ErrorVariable errorOutput # Additional Import-Module ensures that imported cmdlets are visible globally Import-Module (Import-PSSession -Session $exchangeSession -DisableNameChecking -AllowClobber) -Global } catch { # Set the error output to the exception message if ([String]::IsNullOrWhiteSpace($errorOutput)) { $errorOutput = $_.Exception.Message } # Check if error was due to too many runspaces if ($errorOutput -like "*Fail to create runspace because you have exceeded your budget to create runspace*") { $attemptNum += 1 if ($attemptNum -ge $maximumAttempts) { return $false } Write-Information "Encountered throttling when connecting to Exchange Online - waiting 60 seconds before re-attempting to logon. (attempt $($attemptNum + 1)/$($maximumAttempts))" Start-Sleep -Seconds 60 continue } # Check if error was due to the remote shell going missing elseif ($errorOutput -like "*failed because the shell was not found on the server.*") { $attemptNum += 1 if ($attemptNum -ge $maximumAttempts) { return $false } Write-Information "Encountered an error with the Remote Shell - re-attempting to logon. (attempt $($attemptNum + 1)/$($maximumAttempts))" Start-Sleep -Seconds 10 continue } # Logon was unsuccessful due to other error Write-Error "Failed Exchange Online logon with username '$($username)'.`r`n$($_.Exception.Message)" return $false } # Any other error was present if (![String]::IsNullOrWhiteSpace($errorOutput)) { Write-Error "Failed Exchange Online logon with username '$($username)'.`r`n$($errorOutput)" return $false } # Logon was successful Write-Information "Logon to Exchange Online successful with username '$($username)'." return $true } } |