Friends,
I appreciate any troubleshooting you can help me do. Let me set the stage:
I migrated from Exchange 2003 SP2 to Exchange 2010 by installing 2010 on a new hyper-v guest OS, and moving the mailboxes over. The system mostly works, but I am having some strange reliability issues.
Every 4-5 days, I run into an issue where certain users are no longer able to use Exchange ActiveSync. When this happens, no user is able to use OWA, and get this message when authenticating to OWA:
A server that contains information about your user account and mailbox can't be found.
Naturally, I check the logs, and this is the typical order of errors that start rolling in:
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ASP.NET 2.0.50727.0 ID 1310: A configuration error has occurred.
MSExchange ADAccess 2130: Process w3wp.exe (AirSync) (PID=4136). Exchange Active Directory Provider could not find an available domain controller in domain DC=my,DC=domain. This event may be caused by network connectivity issues or configured incorrectly
DNS server. This event may also occur if you have not configured correctly your multiple Active Directory sites.
MSExchange ActiveSync ID 1015: Exchange ActiveSync experienced a transient error when it tried to access Active Directory information for user "my.domain\user". Exchange ActiveSync will try this operation again. If this event occurs infrequently, no user action is required. If this event occurs frequently, check network connectivity using PING or PingPath. You can also use the Test-ActiveSyncConnectivity cmdlet. More information:
MSExchange ADAccess 2102: Process MAD.EXE (PID=5296). All Domain Controller Servers in use are not responding:
dc1.my.domain
dc2.my.domain
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Many errors come after that, mostly related to the fact that for some reason, this exchange server is no longer talking properly with a domain controller. What I find odd is that, I can ping the dc's just fine. No other hyper-v guests on the same host seem to have this connectivity issue (I updated the host machine NIC drivers to ensure any bugs were fixed).
The only fix I have found so far is to bounce the box, at which time it starts working fine again.
Any steps you guys think I should try to troubleshoot?