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Why does SBS 2008 not allow more than 2 concurrent Outlook Anywhere connections?

Posted on 2009-04-29
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Last Modified: 2012-06-27
I have a newly deployed SBS 2008 server.  I'm running exclusively outlook anywhere over RPC/HTTP.  My first two users can connect and use exchange in Outlook 2007 / 2003 no problem.  

However, the 3rd, 4th or 5th fails to connect.  All I they get is "trying to connect..." forever (longer than 20 minutes with no timeout) the only way to get out is to kill outlook.exe.   The interesting thing is that if I tell 1 and 2 to close their outlooks, 3 and 4 can login no problem - of course preventing 1 and 2 from getting in.  

I have the following theories:

A) It's almost as if there is some concurrent connection limit restriction.  I'd say it's due to licensing except that I've had very similar behavior on the remote company web site (the web mail) where the connection times out the same way prior to login.   So that doesn't add up.

B)   I was running this on VMWare server with 3.5 GB RAM - it was struggling so I thought that may be the culprit, but now I upgraded to a server with 6GB RAM and much faster processors - the system just flies, but still locks out 3rd concurrent user.  

C) Did I purchase some type of a developer version that's limited to only 2 concurrent connections?  Is there even such a thing out there?  I bought this software for $1000 USD (including 5 CALS) from MS open license. I never got nor had to enter CAL keys anywhere.   In fact I don't see a section where I can check current usage as I could in SBS 2003.  

Thank you

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Question by:ixnaum
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Expert Comment

by:ccosby
ID: 24266783
Have you tried to verify that your router isn't causing this issue? You could try to verify this by havin a few local machines connect over it.
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Expert Comment

by:Raghuv
ID: 24267559
Hi,

Check out this question -> http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Server/SBS_Small_Business_Server/Q_24005782.html

Let us know in case if the solution provided in the above question does not help you.
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Accepted Solution

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ixnaum earned 0 total points
ID: 24326406
I finally found a solution:

http://blogit.dslee.org/2009/02/04/outlook-anywhere-sbs-2008-hyper-v/

I have the same symptoms except I'm running VMware.  Below is an excerpt of what needed to be done:

   1. Open regedit with administrative permissions.
   2. Create DWORD and set its value to 5000 decimal to increase the limit of concurrent requests.
      HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ASP.NET\2.0.50727.0\ MaxConcurrentRequestsPerCPU


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