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Troubleshooting Event 2080 from Exchange 2010 topology

Hello All,
I am encountering a problem which causes lockups on our network. When there is a problem with a server (bla1) it causes our local network including (bla2) (also our exchange server) to lock up network drives and lock mail. After about 5 minutes it goes back to normal. No errors are logged on (bla1) only on (bla2) see below. I belive its due to the "reachablity" flag but im not sure how to fix it. Please Help!!!

Process STORE.EXE (PID=1844). Exchange Active Directory Provider has discovered the following servers with the following characteristics:
(Server name | Roles | Enabled | Reachability | Synchronized | GC capable | PDC | SACL right | Critical Data | Netlogon | OS Version)
In-site:
bla1.bla.com      CDG 1 7 7 1 0 1 1 7 1
bla2.bla.com      CDG 1 0 0 1 0 0 0 0 0
Out-of-site:
bla3.bla.com      CDG 1 7 7 1 0 1 1 7 1

Vijaya Babu Sekar

It should be problem with Active directory topology service error. it intermittent issue with communication between Exchange and AD

so please the below article. it should be helpful for understanding and isolate the issue.

http://howdouc.blogspot.com/2011/01/exchange-active-directory-topology.html

Thanks

portillosjohn

ASKER

Great article but how do I start troubleshooting this? I run dcdiag with no errors. One quick note is that exchange is installed on bla2.bla.com if that makes a difference. I inhertited this problem.

Simon Butler (Sembee)

If Exchange is installed on a domain controller, then that server must also be a global catalog. Exchange will also only use itself for DC functionality.

I would start planning to move Exchange off the DC (you cannot run DCPROMO on the machine with Exchange installed).

You could run the EXBPA from the toolbox and ensure that doesn't flag anything else up.

Simon.