Hi All, I unregistered my resource mailbox from Ex 03 environment and moved mailbox to Ex 07 environment. I then converted the mailbox to type Room. I dismounted the database and remounted database. I also has set-mailboxcalendarsettings -id "mailbox" -AutomateProcessing Autoaccept When I send an "update" tocalendar meeting which I had created in Ex 03 environment AutoAccept dosen't send the confirmation back nor does it move the meeting to new time slot. However if I create a new meeting for this resource it dose send me the confirmation back. It also send the confirmation back if I update this new meeting Any idea how to make Update part work for the old meetings which are created in Ex 03 environment Any help will be appreciated. Thanks Hemal Doshi

Hi, Can Meeting Organizer update their owe meeting request using new resource room mailbox? Besides, please try to export calendar items to .pst file on the server and then import againand then check the issue. How to Export Mailbox Data-Calendar http://technet.microsoft.com/en-us/library/bb266964.aspx If that do not help, then please try to test the issue if we create a new resource mailbox in Exchange 2003 and then move to Exchange 2007. Best regards, Xiu