Cannot Open the Free/Busy Information, part 2
Applies to Exchange 2010 SP1 and SP2.
Last November, I wrote that I get this error whenever I try to edit the delegate list for multiple resources at the same time:
I was incorrect about this only happening when I edit multiple resource mailboxes simultaneously. it seems to be random. I see it more often in those cases simply because there are more mailboxes in play and therefore more opportunities for something to go wrong. Even when I add a delegate to a single room or equipment mailbox, sometimes the delegate will get this error.
To fix it, I use ExFolders to modify the permissions for the “Freebusy Data” and “Calendar” folders directly and give the delegate Editor permissions to both. Sometimes the EMC gui adds the permissions correctly, and sometimes it doesn’t. I have no idea why. It has become standard procedure for me now to open ExFolders and double-check every time I modify the delegates list on a resource mailbox. At least half the time, I have to fix the permissions manually.