DSCResources/MSFT_EXOMailboxSettings/MSFT_EXOMailboxSettings.psm1

Confirm-M365DSCModuleDependency -ModuleName 'MSFT_EXOMailboxSettings'

function Get-TargetResource
{
    [CmdletBinding()]
    [OutputType([System.Collections.Hashtable])]
    param
    (
        [Parameter(Mandatory = $true)]
        [System.String]
        $DisplayName,

        [Parameter()]
        [System.String]
        $TimeZone,

        [Parameter()]
        [System.String]
        $Locale,

        [Parameter()]
        [System.Boolean]
        $AuditEnabled,

        [Parameter()]
        [System.String]
        $RetentionPolicy,

        [Parameter()]
        [System.String]
        $AddressBookPolicy,

        [Parameter()]
        [System.String]
        $RoleAssignmentPolicy,

        [Parameter()]
        [System.String]
        $SharingPolicy,

        [Parameter()]
        [ValidateSet('Present')]
        [System.String]
        $Ensure = 'Present',

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $Credential,

        [Parameter()]
        [System.String]
        $ApplicationId,

        [Parameter()]
        [System.String]
        $TenantId,

        [Parameter()]
        [System.String]
        $CertificateThumbprint,

        [Parameter()]
        [System.String]
        $CertificatePath,

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $CertificatePassword,

        [Parameter()]
        [Switch]
        $ManagedIdentity,

        [Parameter()]
        [System.String[]]
        $AccessTokens
    )

    Write-Verbose -Message "Getting configuration of Office 365 Mailbox Settings for $DisplayName"

    try
    {
        if (-not $Script:exportedInstance -or $Script:exportedInstance.UserPrincipalName -ne $DisplayName)
        {
            Write-Verbose -Message "No cached instance found, retrieving from service."
            if ($Global:CurrentModeIsExport)
            {
                $null = New-M365DSCConnection -Workload 'ExchangeOnline' `
                    -InboundParameters $PSBoundParameters `
                    -SkipModuleReload $true
            }
            else
            {
                $null = New-M365DSCConnection -Workload 'ExchangeOnline' `
                    -InboundParameters $PSBoundParameters
            }

            #Ensure the proper dependencies are installed in the current environment.
            Confirm-M365DSCDependencies

            #region Telemetry
            $ResourceName = $MyInvocation.MyCommand.ModuleName -replace 'MSFT_', ''
            $CommandName = $MyInvocation.MyCommand
            $data = Format-M365DSCTelemetryParameters -ResourceName $ResourceName `
                -CommandName $CommandName `
                -Parameters $PSBoundParameters
            Add-M365DSCTelemetryEvent -Data $data
            #endregion

            $nullReturn = @{
                DisplayName = $DisplayName
            }

            $mailboxInfo = Get-Mailbox -Identity $DisplayName -ErrorAction SilentlyContinue
        }
        else
        {
            $nullReturn = @{
                DisplayName = $DisplayName
            }
            $mailboxInfo = $Script:exportedInstance
        }

        Write-Verbose -Message "Found an existing instance of Mailbox '$($DisplayName)'"

        $mailboxSettings = Get-MailboxRegionalConfiguration -Identity $DisplayName -ErrorAction SilentlyContinue
        if ($null -eq $mailboxSettings -or $null -eq $mailboxInfo)
        {
            Write-Verbose -Message "The specified Mailbox doesn't already exist."
            return $nullReturn
        }

        $result = @{
            DisplayName           = $DisplayName
            TimeZone              = $mailboxSettings.TimeZone
            Locale                = $mailboxSettings.Language.Name
            RetentionPolicy       = $mailboxInfo.RetentionPolicy
            AddressBookPolicy     = $mailboxInfo.AddressBookPolicy
            RoleAssignmentPolicy  = $mailboxInfo.RoleAssignmentPolicy
            SharingPolicy         = $mailboxInfo.SharingPolicy
            AuditEnabled          = $mailboxInfo.AuditEnabled
            Ensure                = 'Present'
            Credential            = $Credential
            ApplicationId         = $ApplicationId
            CertificateThumbprint = $CertificateThumbprint
            CertificatePath       = $CertificatePath
            CertificatePassword   = $CertificatePassword
            ManagedIdentity       = $ManagedIdentity.IsPresent
            TenantId              = $TenantId
            AccessTokens          = $AccessTokens
        }

        return $result
    }
    catch
    {
        New-M365DSCLogEntry -Message 'Error retrieving data:' `
            -Exception $_ `
            -Source $($MyInvocation.MyCommand.Source) `
            -TenantId $TenantId `
            -Credential $Credential

        throw
    }
}

function Set-TargetResource
{
    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)]
        [System.String]
        $DisplayName,

        [Parameter()]
        [System.String]
        $TimeZone,

        [Parameter()]
        [System.String]
        $Locale,

        [Parameter()]
        [System.Boolean]
        $AuditEnabled,

        [Parameter()]
        [System.String]
        $RetentionPolicy,

        [Parameter()]
        [System.String]
        $AddressBookPolicy,

        [Parameter()]
        [System.String]
        $RoleAssignmentPolicy,

        [Parameter()]
        [System.String]
        $SharingPolicy,

        [Parameter()]
        [ValidateSet('Present')]
        [System.String]
        $Ensure = 'Present',

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $Credential,

        [Parameter()]
        [System.String]
        $ApplicationId,

        [Parameter()]
        [System.String]
        $TenantId,

        [Parameter()]
        [System.String]
        $CertificateThumbprint,

        [Parameter()]
        [System.String]
        $CertificatePath,

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $CertificatePassword,

        [Parameter()]
        [Switch]
        $ManagedIdentity,

        [Parameter()]
        [System.String[]]
        $AccessTokens
    )

    Write-Verbose -Message "Setting configuration of Office 365 Mailbox Settings for $DisplayName"

    #Ensure the proper dependencies are installed in the current environment.
    Confirm-M365DSCDependencies

    #region Telemetry
    $ResourceName = $MyInvocation.MyCommand.ModuleName -replace 'MSFT_', ''
    $CommandName = $MyInvocation.MyCommand
    $data = Format-M365DSCTelemetryParameters -ResourceName $ResourceName `
        -CommandName $CommandName `
        -Parameters $PSBoundParameters
    Add-M365DSCTelemetryEvent -Data $data
    #endregion
    $null = New-M365DSCConnection -Workload 'ExchangeOnline' `
        -InboundParameters $PSBoundParameters

    Set-MailboxRegionalConfiguration -Identity $DisplayName `
        -Language $Locale `
        -TimeZone $TimeZone

    $needToUpdate = $false
    $updateParams = @{
        Identity = $DisplayName
    }
    if (-not [System.String]::IsNullOrEmpty($AddressBookPolicy))
    {
        $needToUpdate = $true
        $updateParams.Add('AddressBookPolicy', $AddressBookPolicy)
    }
    if (-not [System.String]::IsNullOrEmpty($RoleAssignmentPolicy))
    {
        $needToUpdate = $true
        $updateParams.Add('RoleAssignmentPolicy', $RoleAssignmentPolicy)
    }
    if (-not [System.String]::IsNullOrEmpty($RetentionPolicy))
    {
        $needToUpdate = $true
        $updateParams.Add('RetentionPolicy', $RetentionPolicy)
    }
    if (-not [System.String]::IsNullOrEmpty($SharingPolicy))
    {
        $needToUpdate = $true
        $updateParams.Add('SharingPolicy', $SharingPolicy)
    }
    if ($needToUpdate)
    {
        Write-Verbose -Message "Updating Mailbox specific properties with:`r`n$(Convert-M365DscHashtableToString -Hashtable $updateParams)"
        Set-Mailbox @updateParams
    }
}

function Test-TargetResource
{
    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param
    (
        [Parameter(Mandatory = $true)]
        [System.String]
        $DisplayName,

        [Parameter()]
        [System.String]
        $TimeZone,

        [Parameter()]
        [System.String]
        $Locale,

        [Parameter()]
        [System.Boolean]
        $AuditEnabled,

        [Parameter()]
        [System.String]
        $RetentionPolicy,

        [Parameter()]
        [System.String]
        $AddressBookPolicy,

        [Parameter()]
        [System.String]
        $RoleAssignmentPolicy,

        [Parameter()]
        [System.String]
        $SharingPolicy,

        [Parameter()]
        [ValidateSet('Present')]
        [System.String]
        $Ensure = 'Present',

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $Credential,

        [Parameter()]
        [System.String]
        $ApplicationId,

        [Parameter()]
        [System.String]
        $TenantId,

        [Parameter()]
        [System.String]
        $CertificateThumbprint,

        [Parameter()]
        [System.String]
        $CertificatePath,

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $CertificatePassword,

        [Parameter()]
        [Switch]
        $ManagedIdentity,

        [Parameter()]
        [System.String[]]
        $AccessTokens
    )

    #region Telemetry
    $ResourceName = $MyInvocation.MyCommand.ModuleName.Replace('MSFT_', '')
    $CommandName = $MyInvocation.MyCommand
    $data = Format-M365DSCTelemetryParameters -ResourceName $ResourceName `
        -CommandName $CommandName `
        -Parameters $PSBoundParameters
    Add-M365DSCTelemetryEvent -Data $data
    #endregion

    $result = Test-M365DSCTargetResource -DesiredValues $PSBoundParameters `
                                         -ResourceName $($MyInvocation.MyCommand.Source).Replace('MSFT_', '')
    return $result
}

function Export-TargetResource
{
    [CmdletBinding()]
    [OutputType([System.String])]
    param
    (
        [Parameter()]
        [System.Management.Automation.PSCredential]
        $Credential,

        [Parameter()]
        [System.String]
        $ApplicationId,

        [Parameter()]
        [System.String]
        $TenantId,

        [Parameter()]
        [System.String]
        $CertificateThumbprint,

        [Parameter()]
        [System.String]
        $CertificatePath,

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $CertificatePassword,

        [Parameter()]
        [Switch]
        $ManagedIdentity,

        [Parameter()]
        [System.String[]]
        $AccessTokens
    )

    $ConnectionMode = New-M365DSCConnection -Workload 'ExchangeOnline' `
        -InboundParameters $PSBoundParameters `
        -SkipModuleReload $true

    #Ensure the proper dependencies are installed in the current environment.
    Confirm-M365DSCDependencies

    #region Telemetry
    $ResourceName = $MyInvocation.MyCommand.ModuleName -replace 'MSFT_', ''
    $CommandName = $MyInvocation.MyCommand
    $data = Format-M365DSCTelemetryParameters -ResourceName $ResourceName `
        -CommandName $CommandName `
        -Parameters $PSBoundParameters
    Add-M365DSCTelemetryEvent -Data $data
    #endregion

    try
    {
        [array]$mailboxes = Get-Mailbox -ResultSize 'Unlimited'

        $i = 1
        if ($mailboxes.Length -eq 0)
        {
            Write-M365DSCHost -Message $Global:M365DSCEmojiGreenCheckMark -CommitWrite
        }
        else
        {
            Write-M365DSCHost -Message "`r`n"-DeferWrite
        }
        $dscContent = ''
        $ObjectGuid = [System.Guid]::empty
        foreach ($mailbox in $mailboxes)
        {
            $DisplayNameValue = $mailbox.Name
            if ([System.Guid]::TryParse($mailbox.Identity, [System.Management.Automation.PSReference]$ObjectGuid))
            {
                try
                {
                    $user = Get-User -Identity $mailbox.Identity
                    $DisplayNameValue = $user.UserPrincipalName
                }
                catch
                {
                    Write-Verbose -Message "Could not retrieve user with id {$($mailbox.Identity)}"
                }
            }
            Write-M365DSCHost -Message " |---[$i/$($mailboxes.Length)] $($DisplayNameValue)" -DeferWrite

            if (-not [System.String]::IsNullOrEmpty($DisplayNameValue))
            {
                if ($null -ne $Global:M365DSCExportResourceInstancesCount)
                {
                    $Global:M365DSCExportResourceInstancesCount++
                }

                $Params = @{
                    Credential            = $Credential
                    DisplayName           = $DisplayNameValue
                    ApplicationId         = $ApplicationId
                    TenantId              = $TenantId
                    CertificateThumbprint = $CertificateThumbprint
                    CertificatePassword   = $CertificatePassword
                    ManagedIdentity       = $ManagedIdentity.IsPresent
                    CertificatePath       = $CertificatePath
                    AccessTokens          = $AccessTokens
                }

                $Script:exportedInstance = $mailbox
                $Results = Get-TargetResource @Params
                if ($Results -is [System.Collections.Hashtable] -and $Results.Count -gt 1)
                {
                    $currentDSCBlock = Get-M365DSCExportContentForResource -ResourceName $ResourceName `
                        -ConnectionMode $ConnectionMode `
                        -ModulePath $PSScriptRoot `
                        -Results $Results `
                        -Credential $Credential
                    $dscContent += $currentDSCBlock
                    Save-M365DSCPartialExport -Content $currentDSCBlock `
                        -FileName $Global:PartialExportFileName

                    Write-M365DSCHost -Message $Global:M365DSCEmojiGreenCheckMark -CommitWrite
                }
                else
                {
                    Write-M365DSCHost -Message $Global:M365DSCEmojiRedX -CommitWrite
                }
            }

            $i++
        }
        return $dscContent
    }
    catch
    {
        New-M365DSCLogEntry -Message 'Error during Export:' `
            -Exception $_ `
            -Source $($MyInvocation.MyCommand.Source) `
            -TenantId $TenantId `
            -Credential $Credential

        throw
    }
}

Export-ModuleMember -Function *-TargetResource