Mapi session exceeded the maximum of 32 objects of type "session".

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A

A. Al-Haffar

Dear All

today i started to recieve the above event log on our Exchange 2007 CCR SP1 Rollup 8.

i temp. resolve this error by terminating some user sessions on store.exe by issuing

Get-LogonStatistics USERNAME | Sort-Object clientipaddress | Format-Table username,clientipaddress,logontime , and then colse the connection by using tcpview from SYSInternal, put the ptoblem comes back for different users, could you please explain to me why i am getting this error and how to resolve permanently.

thank you
 
A

AndyD_ [MVP]

This can be caused by a number of reasons:

Desktop Search Engines ( Google Search, Windows Search, Outlook Add-ins like xobni,etc..)

It could also be Outlook 2007/2010 clients that have " Download Shared Folders" option enabled for cache mode. If so, uncheck and test.

You can use exmon to determine which mapi client is hitting the server the most

http://www.microsoft.com/downloads/en/details.aspx?FamilyId=9A49C22E-E0C7-4B7C-ACEF-729D48AF7BC9&displaylang=en

You should also run ExBpa against the server. If ths is Windows 2003, ensure you arent running into any scalable network issues. ExBpa should catch those:

http://msexchangeteam.com/archive/2007/07/18/446400.aspx

You can increase the session level, but I recommend you try to track down the source instead:

http://technet.microsoft.com/en-us/library/bb676486(EXCHG.80).aspx

http://support.microsoft.com/kb/842022
 
A

A. Al-Haffar

Thank you for the reply,

for the Putlook Add-ons we only install EV Outlook Add-ons form Symantec EV for Mail Archiving, regarding the network Scalable we are using Windows 2008 SP2 Enterprise Edition,

Tomorrow i will run the EXPBA and EXMON and provide you the details.

me too i dont recommend to modify the maximum number of sessions allowed.

i will update you, 1 Q, i read in other articles i can reduce the TimeToLive to 5 minutes do you recommend this, if yes how i can do it ?

thank you
 
A

AndyD_ [MVP]

I would focus on the finding the culprits rather than trying to " fix" any TTLs. The EV Add-in might be a good place to start. Also check to see if any Outlook 2007/2010 clients have download shared folders checked.
 
A

A. Al-Haffar

i got something strange when running EXBPA,

it says This server has 1 GB or more of physical memory and HeapDeCommitFreeBlockThreshold has not been set to 262144 , please go to http://technet.microsoft.com/en-us/library/aa998162(EXCHG.80).aspx , we recently failed over to the passive(previously) node and after that i start recieving this error , do you think i have to modify the registrey key please advice me, and regarding the shared folder options the users who complain have Outlook 2003 , Outlook 2007 users didnt complain.

waiting for the reply

thank you
 
A

A. Al-Haffar

i modified the registery key, re-run EXPBA and got no errors

do i have to restart the exchange server ??
 
G

Gavin-Zhang

Hi A.AL-Haffar,
You do not need restart the exchange server.
Regards!
Gavin
 
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