Does anyone know what Exchange Online PowerShell commands to use to get all the users that have SendAs AccessRights to a given shared mail box.
 I was thinking it was something with Get-Mailbox | Get-RecipientPermission but I need the additional correct syntax.
Thanks, Jeff
Try this Jeff!
Get-RecipientPermission | where {($_.Trustee -ne ‘nt authority\self’) -and ($_.Trustee -ne ‘null sid’)}