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Found an article. Please check it. It is related to SCC<br />
<br />
<a href="http://technet.microsoft.com/en-us/library/bb397217(EXCHG.80).aspx" rel="ugc">http://technet.microsoft.com/en-us/library/bb397217(EXCHG.80).aspx</a>
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Found an article. Please check it. It is related to SCC

http://technet.microsoft.com/en-us/library/bb397217(EXCHG.80).aspx [http://technet.microsoft.com/en-us/library/bb397217(EXCHG.80).aspx]

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Hi<br />
<br />
So we may have had high load on the active node before the failover. In your answer above, you say:<br />
<br />
&gt;&gt;&gt;Some of the common causes of a cluster failover are:<br />
Server performance<br />
Unexpected process termination<br />
Unresponsive process(es)<br />
Disk subsystem latencies<br />
Anti-Virus configuration<br />
Network changes<br />
<br />
Is there a log or Event ID anywhere that will tell me which one of these caused the CMS to fail over to the passive node?
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Hi

So we may have had high load on the active node before the failover. In your answer above, you say:

>>>Some of the common causes of a cluster failover are:
Server performance
Unexpected process termination
Unresponsive process(es)
Disk subsystem latencies
Anti-Virus configuration
Network changes

Is there a log or Event ID anywhere that will tell me which one of these caused the CMS to fail over to the passive node?

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Check the System Logs. You might see the warning and error messages during that time, when failover was happened. 
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Check the System Logs. You might see the warning and error messages during that time, when failover was happened.

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<div class="content wysiwyg-content">
Hi<br />
<br />
I'm running Exchange 2007 SP2/Windows 2008 Server in Active-Passive SCC cluster.<br />
<br />
Node1: Exchp1.domain.com<br />
Node: Exchp2.domain.com<br />
CMS: ExchCMS.domain.com<br />
<br />
Last night, the CMS failed over from P1 to P2 it seems. I notice that because when I connected to ExchCMS this morning, I connected to P2.<br />
<br />
I think there were some performance issues on the P1 server, but I'd like to know what actually caused the CMS to fail over? Is there a certain criteria? And what would we look for in the Event Log to show what caused it?
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Hi

I'm running Exchange 2007 SP2/Windows 2008 Server in Active-Passive SCC cluster.

Node1: Exchp1.domain.com
Node: Exchp2.domain.com
CMS: ExchCMS.domain.com

Last night, the CMS failed over from P1 to P2 it seems. I notice that because when I connected to ExchCMS this morning, I connected to P2.

I think there were some performance issues on the P1 server, but I'd like to know what actually caused the CMS to fail over? Is there a certain criteria? And what would we look for in the Event Log to show what caused it?

Reason for Exchange cluster failover

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.