One Exchange 2010 server didn’t mount databases after each reboot. When I looked to Event viewer I saw following events:
and also
These System events are not really usefull. So I’ve looked into Application events and I saw following event:
And now we know what the problem is.
When I looked at the time on Exchange server and domain controller time
looked the same. Weird.
After couple minutes of looking into
events I found events saying about time synchronization with domain
controller. Difference before synchronization was 7 minutes. When I
restarted service Microsoft Exchange Active Directory Topology Service all databases mounted correctly.
Exchange mailbox server is virtual machine (VM) in VMWare. And that was a problem. When VM is starting it gets time from ESX server on which VM is running. And that was a problem. ESX server had bad time set. When mailbox Exchange server
was starting it aquired bad time from ESX server. VM begun starting
services and also Exchange services. Then mentioned services couldn’t
start because of time difference between DC and VM. After couple minutes
clock got synchronized from DC, but Exchange services didn’t notice
that.
So solutions for these problems:
-
synchronize times on ESX and DC from same source
-
don’t let VMTool to synchronize time on VM
-
to force synchronize time using command: Net time \DomainController /Set
-
by restarting service Microsoft Exchange Active Directory Topology Service time is also checked and also authentification re-established
This problem was caused probably by forcing Kerberos ticket time difference by default to 5 minutes.
sumber : http://www.cievo.sk/2012/08/16/unable-to-initialize-the-information-store-service/
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