Scenario: If you want to verify membership of a Exchange dynamic distribution group, run the following:
$DDG = Get-DynamicDistributionGroup All_Mbx
Get-Recipient -RecipientPreviewFilter $DDG.RecipientFilter
Scenario: If you want to verify membership of a Exchange dynamic distribution group, run the following:
$DDG = Get-DynamicDistributionGroup All_Mbx
Get-Recipient -RecipientPreviewFilter $DDG.RecipientFilter