Public/Permissions/EXO/Get-EXOSendAsPerms.ps1

function Get-EXOSendAsPerms {
    <#
    .SYNOPSIS
    Outputs Send As permissions for each object that has permissions assigned.
    This is for Office 365
 
    .EXAMPLE
 
    (Get-Mailbox -ResultSize unlimited | Select -expandproperty distinguishedname) | Get-EXOSendAsPerms | Export-csv .\SA.csv -NoTypeInformation
 
    #>

    [CmdletBinding()]
    Param (
        [parameter(ValueFromPipeline = $True, ValueFromPipelineByPropertyName = $True)]
        $DistinguishedName,

        [parameter()]
        [hashtable] $RecipientMailHash,

        [parameter()]
        [hashtable] $RecipientHash,

        [parameter()]
        [hashtable] $RecipientLiveIDHash

    )
    Begin {


    }
    Process {
        Write-Verbose "Inspecting: `t $_"
        Get-EXORecipientPermission -Identity $_ -Verbose:$false |
        Where-Object {
            $_.AccessRights -like "*SendAs*" -and
            !$_.IsInherited -and !$_.trustee.startswith('S-1-5-21-') -and
            !$_.trustee.startswith('NT AUTHORITY\SELF') -and !$_.trustee.startswith('NULL SID') -and
            !$_.trustee.contains('\')
        } | ForEach-Object {
            $Trustee = $_.Trustee
            $Type = $null
            Write-Verbose "Has Send As: `t $Trustee"
            if ($RecipientMailHash.ContainsKey($_.Trustee)) {
                $Trustee = $RecipientMailHash["$($_.Trustee)"].Name
                $Email = $RecipientMailHash["$($_.Trustee)"].PrimarySMTPAddress
                $Type = $RecipientMailHash["$($_.Trustee)"].RecipientTypeDetails
            }
            $Email = $_.Trustee
            if ($RecipientHash.ContainsKey($_.Trustee)) {
                $Email = $RecipientHash["$($_.Trustee)"].PrimarySMTPAddress
                $Type = $RecipientHash["$($_.Trustee)"].RecipientTypeDetails
            }
            if ($RecipientLiveIDHash.ContainsKey($_.Trustee)) {
                $Trustee = $RecipientLiveIDHash["$($_.Trustee)"].Name
                $Email = $RecipientLiveIDHash["$($_.Trustee)"].PrimarySMTPAddress
                $Type = $RecipientLiveIDHash["$($_.Trustee)"].RecipientTypeDetails
            }
            [pscustomobject]@{
                Object               = $_.Identity
                PrimarySmtpAddress   = $RecipientHash["$($_.Identity)"].PrimarySMTPAddress
                Granted              = $Trustee
                GrantedSMTP          = $Email
                RecipientTypeDetails = $Type
                Permission           = "SendAs"
            }
        }
    }
    END {

    }
}