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Reduce Mapi Timeout Settings Exchange 2003 - Event ID 9646

Posted on 2009-05-15
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Last Modified: 2012-06-27
Hi

We are runnging Exchange 2003 (SP2) on Windows 2003 (SP2). Recentley we have been seeing Event ID 9646 "Mapi session "/o=COMPANY/ou=First Administrative Group/cn=Recipients/cn=USER" exceeded the maximum of 32 objects of type "session".

I have read articles (see below) about decreasing the Mapi Timeout Session..  

Value name: KeepAliveTime
Key: Tcpip\Parameters
Value Type: REG_DWORD-Time in milliseconds
Valid Range: 1-0xFFFFFFFF
Default: 7,200,000 (two hours)

By the looks of the articles this Registry Entry should be there by default but we don't seem to have it. Should we manually add this in?

I don't want to increase the amount of mapi sessions allowed as i want to eventually find the cause of the users that this is happening too.

Any suggestions

http://support.microsoft.com/default.aspx?scid=kb;EN-US;324270
http://support.microsoft.com/kb/315669
http://support.microsoft.com/kb/842022
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Question by:James Hurley
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Rajith Enchiparambil earned 1500 total points
ID: 24394773
If you don't have it, just add the registry entries, no harm there.

Take a backup of the registry if you are not confident.
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Author Closing Comment

by:James Hurley
ID: 31581864
Thanks, added to the registry and it didn't fall over. All seems to be working well. Thanks
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