Yes, I've restarted the services, and I've rebooted the server, the error comes back within a few minutes of users getting back online with Exchange.
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Mapi session exceeded the maximum of 32 objects of type "session"
Hi,
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
Date: 9/4/2007
Time: 2:04:26 PM
User: N/A
Computer: C0SS01
Description:
Mapi session "/o=firstorganisation=Corp
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.
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Answers
Possibly relevant information: the first time this error shows up inthe event log was approximately the same day that I uninstalled Symantec Mail Security for Exchange and moved spam filtering to a service provider. There is no spam filtering software installed on any of the client PCs, only Symantec's corporate antivirus program.
The 'Maximum Allowed Sessions Per User' would be the setting that is pertinent to your situation - and I'm not sure why it didn't help alleviate the problem.
I would suggest, as this article states (http://support.microsoft.
Another remedy I have seen in the past is discussed here: http://msexchangeteam.com/
Which involves disabling the TCP Chimney:
Netsh int ip set chimney DISABLED
Hey,
You have to add View Information Store permission for every user you want to connect and view his email on the Exchange server. To do this:
" Grant View Information Store Status permissions to the account under which the program runs
Note Programs that run under an account that has these permissions are not affected by the MAPI sessions-per-user limit.
To grant View Information Store Status permissions, follow these steps:
1. In Exchange System Manager, right-click the Exchange Server object or the mailbox store to which you want to grant the permissions, and then click Properties.
2. Click the Security tab.
3. Click the account to which you want to grant the permissions.
If the account is not listed, click Add, click the account name, click Add, and then click OK.
4. Under the Allow column, click to select the View information store status check box, if this check box is not already selected.
5. Click to clear the check boxes for any permissions that are not required, and then click OK.
Note You may have to follow this step if you clicked Add to add the account in step 3. This is because every check box in the Allow column was selected when you added the account in step 3.
Try doing this. Worked for me.
I DONT LIKE PLAYING WITH PERMISSIONS ON FOLDERS.....
I DONT LIKE PLAYING WITH REGISTRY ENTRIES IN ORDER TO UNDERMINE THINGS MICROSOFT DID TO MAKE THE SERVER FASTER AND MORE SECURE (kicking up the 'session' limit), THUS ELIMINATING THE SECURITY BENEFIT.....
I DONT LIKE GRANTING ACCESS TO ANYTHING THAT A USER WASN'T DESIGNED TO HAVE....
I think the answer on this thing is in the NDIS driver issue that aissim speaks about.
The problem here is not with the server itself but the client that is connecting to the Server. They have an underlying network issue that is causing them to get disconnected from the server. But the method in which they disconnect is not clean, so Exchange is unaware that the session is terminated. The next time said person connects, another 'session' is used up until the maximum is reached. That's when they can't connect anymore.
We had this issue with only one person in our organisation. I didn't want to change permissions / reg entries just to get this problem solved. In our case, the person had a dodgy wireless connection which meant that when she was connected via the VPN it created lots of 'orphan' sessions with the Exchange Server. Giving her a new wireless router, resolved our problem!
Yes, sort out the issue with the user/ user's computer that is experiencing the problem. I find that when this problem appears it only affects one or maybe two users. If all my users experienced it daily then I would say Microsoft would have to fix it or I could implement one the many workarounds (but reducing security - I feel) that would negate this problem.
Just ran into the same issue at a client. I ran through the article http://msexchangeteam.com/
Interesting discussion. We appeared to have ran into a similar situation and my internet search brought me here (once again).
We recently moved one of our offices to a new location and for time being a dsl-line was installed untill the lines are delivered. Since the move all users from that office have the same issue, getting their mapi sessions exceeded to 32 and having no access to the exchange server anymore.
Our problem seems to be the temporary dsl which is not sufficient to support our 20 users at the office.
Thanks za_mkh, your adding put us on the right way. We're contacting the dsl provider now to have this solved.
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by: aissimPosted on 2007-10-09 at 08:18:14ID: 20041680
Have you restarted the Exchange services? A simple reboot of the machine will clear up those sessions/connections....at