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So my exchange server stopped working along with the web server and such, and system attendant started hanging in startup.  I searched for the problem and really didn't find anything useful until I found a single forum response that solved the problem.  Here's the error message I was seeing in the event viewer:

Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=3392). Topology discovery failed, error 0x80040a02 (DSC_E_NO_SUITABLE_CDC). Look up the Lightweight Directory Access Protocol (LDAP) error code specified in the event description. To do this, use Microsoft Knowledge Base article 218185, "Microsoft LDAP Error Codes." Use the information in that article to learn more about the cause and resolution to this error. Use the Ping or PathPing command-line tools to test network connectivity to local domain controllers.

The fix came from a hint that I saw here.

Basically, I had disabled IPV6.  As soon as I re-enabled it, things started working again.  This is on a single server that hosts exchange, a web page, AD, etc--basically, it's my experimental server, and granted, I'm not supposed to put EVERYTHING on one server, but you work with what you've got. :)

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Posted on Sunday, March 9, 2008 10:36 PM | Back to top


Comments on this post: Exchange 2007, windows server 2008 problem and fix

# re: Exchange 2007, windows server 2008 problem and fix
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I had also disabled IP v6, and tried to install Exchange 2007 on a single Windows Server 2008, with the same results as above. Your tip seems to work just fine!

I wonder why Microsoft doesn't document this problem, as it certainly will affect most of the Exchange 2007 and Windows Server 2008 buyers. A search for the problem at microsoft.com or msdn.microsoft.com didn't reveal anything other than some babbling about LDAP.
Left by Roar Berg on May 02, 2008 5:29 AM

# re: Exchange 2007, windows server 2008 problem and fix
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Thanks for the tip, but did not work. I can't even get to network settings as it just locks up. My IP v6 was disabled so I could get mail to flow finally, and then when I went to add a sound driver am now screwed. Looks like another reinstall for the 3rd time., I miss Exchange 5.5, no problems with it. 2007 is a bloted mule.
Left by Frustrated on Oct 07, 2008 10:02 PM

# re: Exchange 2007, windows server 2008 problem and fix
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Same problem here. I disabled IPV6 and had the same problems. Reenabling it cleared it all up.

Thanks everyone.
Left by Sam I am on May 13, 2009 9:12 PM

# re: Exchange 2007, windows server 2008 problem and fix
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That was it.. I spent almost 48 hrs banging my head and searching google all over for the answer..
Left by tarang on Jan 03, 2010 10:58 PM

# re: Exchange 2007, windows server 2008 problem and fix
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I started with IPV6 disabled... I read somewhere to enable it and all should work... I too have the same problem.... I am about to disable IPV6 and see what happens... Any other suggestions?
Left by Daeta on Jan 31, 2010 5:16 PM

# re: Exchange 2007, windows server 2008 problem and fix
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wow , so simple but good. read somewhere to disable ip6 before instaling exchange, was about to reinstall, thanks. i gues you cant believe everything you read.
Left by jl on Aug 22, 2010 2:21 AM

# re: Exchange 2007, windows server 2008 problem and fix
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Great blog MAN,
Same Senario of mine, mean One Server and Exchange 2007 and had IPv6 disabled, after enabling IPV6 resolved my issue !,

Thanks for saving another day :)
Left by Muhammad Younas on Apr 17, 2012 11:09 AM

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