I have a hybrid O365 implementation started. I have about 25 Room mailboxes that were created in Exchange 2010 SP3 (on premise). I migrated 3 of them to O365. They seem to work, but when on premise users go to their Address Book in Outlook and drop down to All Rooms, the Capacity column is empty for those 3 mailboxes. They can see the correct capacity for the mailboxes still on premise, just not the O365 room mailboxes. O365 users can see the correct capacity for all room mailboxes regardless of location. All other columns for All Rooms have data in them, just the capacity column is affected. Is this expected behavior?