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Exchange 2010 - MSExchangeISClient\Client Connection count is over 2 billion - yes 2 billion

Posted on 2010-09-20
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Last Modified: 2012-06-14
Trying to troubleshoot a performance issue here.  Here is what I got;

Exchange 2010
Separate servers for each role (cas, hub, mailbox)
80 users, all running in cached exchange mode
all users have blackberries

In troubleshooting, I noticed something, on my Mailbox server, the MSExchangeISClient\Client Connection count is over 2 billion.  You read that right.  Almost all of it is from the Exchange Administrator account.

Now I have another location in my active directory set the same way as this location, their client connection count peaks around 800.  They have around 35 users.

What is causing all these client connects on that one server to reach over 2 billion?  and from the ex admin account?  I don't get it.  How do I narrow this down?

Each exchange server has 8GB of ram, 2 procs, pretty heavy machines. - not sure how much that matters, given the information at hand.

thanks
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Question by:Vjz1
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by:FDiskWizard
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Where are you seeing the admin info? Have you checked with EXMON?
http://www.microsoft.com/downloads/en/details.aspx?FamilyId=9A49C22E-E0C7-4B7C-ACEF-729D48AF7BC9&displaylang=en

I've only seen high connects (Operations) from users when some third party app is playing. Like Shoretel importing lots of contacts, or some desktop search is indexing like crazy.

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by:FDiskWizard
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Oh, and I think the high ops from a user I've seen is around 20,000. Billion is a big number! :)
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by:smartsid
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Are you running any third party MAPI application like blackberry enterise server ? if yes then u should check their impact on the server as well.
Any useful information in application logs of the server ?
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by:Vjz1
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yes, BES is running
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by:smartsid
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Are you using Exchange Aministrator account as service account for BES?
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by:Vjz1
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negative, i have a separate account i created for all BES services.
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by:smartsid
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It is strange situation.
Does Exchange server has loggin enabled ? If yes, you shold look into security logs of the server. It will giv
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by:smartsid
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It can give us some lead on connections from Ex admin account.
if there are no services running from this ex admin account then i suggest to change the password for this account.
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by:Vjz1
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i can do this, what am i looking for?

I see logon and logoff event from things i would expect, my CAS and Mailbox servers.

what should i be looking for?

thx
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by:smartsid
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You should look for logon event from Ex admin account.
Better you change the password first and then look for failure audits.  
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by:Vjz1
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forgive my next question, but what is the ex admin account?  like what's the username?
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by:e_aravind
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Looks like smartsid is suggesting for the "Exchange Admin" account the default admin for the AD/Exchange servers
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by:Vjz1
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there is no account 'exchange admin' in my AD

perhaps i confused the situation, i was talking about the service “exchange administrator service” not an account.

any ideas??
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Author Comment

by:Vjz1
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Just so everyone understands what I'm seeing, here's a screen cap of my perfmon;


perfmon.JPG
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Vjz1 earned 0 total points
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No Answer - please close question
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by:FDiskWizard
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Are you still having that issue? Did you ever try ExMon tool from Microsoft?
It should point out WHO is causing the high connections.
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Author Closing Comment

by:Vjz1
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no solution - please close question
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by:chriswise2004
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Yes, I am having the same issue.  10k it dies.
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