Exchange Resetting Security Groups for Exchange 2013 Exchange 2007 let me add normal Active Directory Security Groups to Shared Mailboxes, so that's how I created them all in the past, but this is not quite the correct way - In order to assign access through the Exchange Admin Center the Group
Exchange Exchange 2013 - creating mailboxes for everyone in an OU Nice and simple PowerShell one-liner to create mailboxes for everyone in an Active Directory Organisational Unit (useful for Mail-enabling a few hundred Student accounts in one hit). On your Exchange server, open the Exchange Management Shell and run this command Get-User -OrganizationalUnit "OU=