We have recently encountered a very curious issue - we have a conference room here that has it's own Outlook Calendar (Conference Room 1) and some users who have upgraded their Office versions to 2010 and 2013 now no longer have their meeting invitations auto-accepted by the Conf. Room calendar. It sits there "grayed out" (not accepted) and is tentative. The problem is that now that meeting schedule can be overwritten by someone else as it is only tentative. Outlook 2007 users continue to have their bookings auto-accepted just fine.
Has anyone seen this before? I have looked around for an MS fix but there doesn't seem to be one.
Any help would be greatly appreciated!