Verify-MSCoreUTransportWhitelists

Verify-MSCoreUTransportWhitelists.ps1

function Verify-MSCoreUTransportWhitelists
{
<#
.Synopsis
   Verify-MSCoreUTransportWhitelists

.DESCRIPTION
   
   The Verify-MSCoreUTransportWhitelists cmdlet lists whitelisted domains if present
   
   Secure Score Reference: Do not use transport white lists
  
 #>
    [CmdletBinding()]

    Param
    (
        [System.Management.Automation.PSCredential]$userCredential
    )
    Begin
    {
        Try{
        #This gets us connected to an Exchange remote powershell service
        $ExoSession = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://outlook.office365.com/powershell-liveid/ -Credential $userCredential -Authentication Basic -AllowRedirection
        Import-PSSession $ExoSession
        }
        Catch{
            write-error "Error loading exchange online module"
            Remove-PSSession $ExoSession
            exit
        }
    }
    Process
    {
        $whitelisttransportrules = Get-TransportRule | Where-Object {$_.Conditions -like "Microsoft.Exchange.MessagingPolicies.Rules.Tasks.SenderDomainIsPredicate" -and $_.Actions -like "Microsoft.Exchange.MessagingPolicies.Rules.Tasks.StopRuleProcessingAction"}


        $result = @()
        ForEach ($rule in $whitelisttransportrules)
        {
            $object = [PSCUSTOMOBJECT] @{
            Name = $rule.Name
            State = $rule.State
            Description = $rule.Description
            SenderDomainList = $rule.SenderDomainIs
            StopRuleProcessing = $rule.StopRuleProcessing
            Conditions = $rule.Conditions
            Actions = $rule.Actions
            }

            $result = $result + $object
        }

        $output = [pscustomobject]@{
        SecureScoreReference = "Do not use transport white lists"
        RuleCount = $result.Count
        Data = $result
        }
    }
    End
    {
        Remove-PSSession $ExoSession
        $output
    }
}