Get-RemoteUserMailbox.ps1

Function Get-RemoteUserMailbox {
[CmdletBinding()]
Param(
[Parameter()]
[string]$SearchBase = "$((ActiveDirectory\Get-ADDomain).DistinguishedName)",
[Parameter()]
[int32]$ResultSetSize = 10000,
[Parameter()]
[string]$SearchScope =  'SubTree'
)
Begin {}
Process {
    $HT = @{
        Filter = 'msExchRecipientTypeDetails -eq 2147483648'
        SearchScope =  $SearchScope
        ResultSetSize = $ResultSetSize
        SearchBase = $SearchBase
        ErrorAction = 'Stop'
    }
    try {
        ActiveDirectory\Get-ADUser @HT
    } catch {
        Write-Warning -Message "Failed to query AD because $($_.Exception.Message)"
    }
}
End {}
}