Mapi session exceeded the maximum of 32 objects of type "session"
Posted on 2007-10-09
I am getting the following on Small Business Server 2003, SP1 with Exchange patched at SP2, and for whichever user this error happens, that particular user will not b able to use outlook.
Event Type: Error
Event Source: MSExchangeIS
Event Category: General
Event ID: 9646
Time: 2:04:26 PM
Mapi session "/o=firstorganisation=Corporate/cn=Recipients/cn=xyzuserr" exceeded the maximum of 32 objects of type "session".
I've tried every registry hack that I've found on EE to workaround this, I've added the MaxOpenMessagesPerLogon key with Session set to 100, I've set "Maximum Allowed Sessions Per User" to 100, I've added a new key MaxObjsPerMapiSession with DWORD value Session set to 100. I do not see anything in the registry for enabling TCPChimney, and the disabled command returns a "not found" error.
Any suggestions? I was not planning on patching to SP2 because we are in discussions on a server upgrade.