Can anyone help me please? I am trying to get Exchange online resource calendar sharing between tenants working.
I have visiting countless articles and nothing seems to be working.
I have enabled organisation sharing between the two tenants, and enabled -ProcessExternalMeetingMessages on the calendar processing. However when a user in tenant B tries to invite the resource calendar from tenant A they get a bounce back policy violation 550 5.0.350 Remote server returned an error -> 550 invalid mailbox.
Also is there a way of viewing the calendar resource on tenant A from the room finder for a user on tenant B?
