We upgraded to Exchange 2007 SP2 and Forefront for Exchange 2010 this weekend and it seems to have broken the auto-accept feature on our resource rooms. Get-mailboxcalendarsettings shows autoaccept enabled but the appointments sit in the room's Inbox. test-outlookwebservices -id "room" -targetaddress "me" shows success as well as vice-versa. Any idea how else I can troubleshoot this?

More information:The Mailbox Assistant is failing on the mailbox server with EVENT ID 7000The Microsoft Exchange Mailbox Assistants service failed to start due to the following error: Microsoft Exchange Mailbox Assistants is not a valid Win32 application. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

http://support.microsoft.com/kb/812486 resolvedSP2 failed to create the imagepath key. I reran SP2 to create the key and then since the service path had spaces I put it in quotes.