Exchange 2010 Mailbox access & Routing issue

Posted on 2013-12-29
Last Modified: 2014-01-19
Dear Experts.
We are facing strange issue with our exchange 2010 environment,in a day some users are not able to connect to exchange server outlook shows reconnecting at the same time same user cannot access to OWA as well its happening for 1-2 hours after that it will be fine, and it not all users at same time and some times even internal mails are taking long time to deliver.

Exchange environment:
Two exchange 2010 SP3 servers configured as DAG, and CAS array pointing to Node1 and node2 is a cold backup, ESET email security installed on both servers.

Question by:emtechadmin
LVL 31

Expert Comment

by:Gareth Gudger
ID: 39744967
Good afternoon,

Anything showing up in the Event Logs?

Are these physical or virtual machines?

Any indication of network issues (bad NIC, cabling, etc).

Expert Comment

ID: 39745361
What exact error the users are getting when they tried login to OWA? Please share how transport role is configured as you are telling some issues with transmitting the mails? Are the internal users able to login to OWA all the time?

Expert Comment

ID: 39745425
Did you Check event viewer may be some DC/GC issues  .

Can you check connectivity between Mailbox Server & CAS servers

Are you see any errors
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Expert Comment

by:Diwakar Sharma
ID: 39751224
The problem is looking like with CAS as in Exchange 2010 MAPI and OWA both connects with client access server.

You can use remote connectivity analyzer to troubleshoot this issue.

Accepted Solution

emtechadmin earned 0 total points
ID: 39781609
got support from Microsoft, issue with NOD32 antivirus once i uninstalled it the issue fixed

Author Closing Comment

ID: 39791974
got support from Microsoft, issue with NOD32 antivirus once i uninstalled it the issue fixed

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