Restricting Room Mailbox Bookings to Specific Groups

Copper Contributor



We have a Room Resource in Exchange Online that we wish to only be book-able to a specific AAD or M365-group. Is that possible and how?


Thank you in advance!


4 Replies
Configure the Calendar processing settings on the mailbox, in particular the -BookInPolicy one. For example:

Set-CalendarProcessing RoomName -BookInPolicy groupname
I set the BookInPolicy on a resource mailbox to a group and it still allows all users to submit booking requests. Is there another setting that impacts this?
Jay, the other setting you need to use is AllBookInPolicy. It must be set to $False to limit invites to users on the BookInPolicy list.
Can this be done without running PowerShell command?