PS HarriJaakkonen :~/Blog/Posts> cat ./add-group-as-delegate-to-room-or.html Add a Group as delegate to Room or Resource mailbox. 05/02/2015 · 1 min read · Post #50 Exchange Powershell Just add universal mail-enabled security group to delegates ... well no. Here's the way... Set-MailboxFolderPermission -Identity "resource_mailbox:calendar" -User "group_to_add_as_delegate" -AccessRights Editor Set-CalendarProcessing -ResourceDelegates "group_to_add_as_delegate" -Identity "resource_mailbox" Share this: