We are currently on Exchange 2007 SP3 (4 mailbox servers) and Almost all clients are on Outlook 2003. At this point we do not use Resource mailboxes. All conference rooms are still regular user mailboxes. Conference room Calendars are set to "Automatically accept meeting requests and process cancellations" When users booked these calendars are Resources for meetings, the appointment would auto-accept and everyone is happy. Lately I've been getting reports that this isn't happening. (I brushed it off for a bit, because no 2 people here book things in the same manner, so nobody knows what to expect) When a room is booked it just sits there as tentative instead of as busy. This is a problem. We were running 2007 w/SP2 for over a year. I recently upgraded all systems to SP3. I can't pinpoint it to that, but it's the only thing that's really changed. I need some assistance.

Please confirm if the issue happens to all the senders Please confirm if the issue only happens the single resource mailbox. If yes, please compare the settings between the working resource mailboxes and the problematic ones Please set the “AutomateProcessing” to “AutoAccept” by using “Set-MailboxCalendarSettings” cmdlet James Luo TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

All users have this problem. All calendars have this problem. I cannot set the -AutomateProcessing flag on the conference room mailboxes because they are regular user mailboxes; not resource mailboxes. The option for "Automatically accept meeting requests and process cancellations" in Outlook is turned on. So entries should automatically be accepted. This is how rooms have always been configured (Since Exchange 2003) This stopped working after a SP3 upgrade to Exchange 2007.

Hi Change the user type from user to room, equipment etc? Set-Mailbox -id username Room http://technet.microsoft.com/en-us/library/bb123981.aspx Then you should be fine to set the autoaccept valueJonas Andersson MCTS: Microsoft Exchange Server 2007/2010 | MCITP: EMA 2007/2010 | Blog: http://www.testlabs.se/blog | Follow me on twitter: jonand82

This is kind of complicated to explain, but that's not something we can do at this point. Users are still on Outlook 2003 which utilizes Resource rooms a little differently that modern versions. The biggest part is, say for example, the IT department... We have 3 conference rooms in our area. Almost everyone has those 3 calendars open in outlook so they can look at it. The default "Resource" method in Exchange 2007 doesn't allow for this. Even if I enable the account in AD, there are still problems. If I add myself under OWA as someone who can use this resource, the calendar permissions in Outlook are set to NONE for my account. So for every user, I'd have to set permissions in two places, neither of which are very convenient... Aside from the conference rooms, there are users who like to have their mailbox set up to auto accept meeting requests... This isn't working anymore. It worked before SP3. It doesn't work now.