One user has accidentally deleted a folder(it has 600+ items) from his mailbox. When we tried recovering from "Recover Deleted Items" it is failing with below error. "Outlook was unable to recover some or all of the items in this folder. Make sure you have the required permissions to recover items in this folder and try again. If the problem persists, contact your administrator." At the time of performing recovery operations, I am seeing below event in server which is talking about the objfolder limit which is 500 in Exchange 2007 SP2 environment. Can any one suggest me how can I proceed in this kind of scenario? If you answer is to increase the MAPI connection limit, to what value I should increase? Is there any other way available to address this situation. Event Type: Error Event Source: MSExchangeIS Event Category: General Event ID: 9646 Date: 5/19/2010 Time: 3:45:47 PM User: N/A Computer: MAIL1 Description: Mapi session "/o=CCC/ou=XXX/cn=Recipients/cn=User1" exceeded the maximum of 500 objects of type "objtFolder".Thanks, Sitaram http://techibee.com http://sitaram-pamarthi.com

Hello, => If Exchange is installed on the Windows 2003 Server and you are getting Event ID 9646 in application log then Disabled the TCP\IP chimney from command prompt Netsh int ip set chimney DISABLED It will fix the Event ID 9646 in application log.MicroSoft Exchange Admin. & Connector EXCHANGE2010, MCSE, MCTS, MCSA MESSAGING, CCNA & GNIIT

Are you looking at a fix for this Event ID or trying to recover the Deleted folder from the Client Machine. It would be advised not to change the Registry. And for the Deleted Item you can use other Exchange Tools to get them back that is within retention period. Ashwin Raj

What other exchange tools? Can you help me with names?Thanks, Sitaram http://techibee.com http://sitaram-pamarthi.com

Hello Pamarths, Did you tried the steps provide by me. Whether Event ID 9646 error is resolved or not ? please let us knowMicroSoft Exchange Admin. & Connector EXCHANGE2010, MCSE, MCTS, MCSA MESSAGING, CCNA & GNIIT

Pamarths, Did you ever find a solution to this problem? This is a Windows Small Business Server 2008, which means it's running Exchange 2007 on Windows Server 2008. I tried PKT_'s solution, and it didn't work. I got a response of: The following command was not found: int ip set chimney DISABLED. Basically, if a user deletes a folder containing too many items, the "Recover Deleted Items" command simply fails. I'm amazed that this is the case.

Yes PKT, I tried that but no luck. Thanks, Sitaram http://techibee.com http://sitaram-pamarthi.com

I resolved it by increasing the ObjFolder limits. Thanks everyone for pouring your thoughts. I blogged about this at http://techibee.com/outlook/case-of-problems-in-recoverying-emails-recover-deleted-items-option-in-outlook-fixed/625 Thanks, Sitaram http://techibee.com http://sitaram-pamarthi.com