Cluster service fails when virtual machine is migrated

Dear all

I noticed that when mailbox server is migrated by system in vmware vsphere, the cluster service failed and IP conflict happened

 what to do to avoid that ?

Topology :
I have 2 domain controllers in the same site with windows server 2008 R2 enterprise
2 load balanced hub cas server with exchange 2010 service pack 1 and operating system windows server 2008 R2 enterprise
2 clustere mailbox server with exchange 2010 service pack 1 and operating system windows server 2008 R2 enterprise

all these servers are virtual machine in vmware vsphere
omzeyadAsked:
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Paul SolovyovskySenior IT AdvisorCommented:
Since these mailbox servers are in a cluster I would pin them to the ESX hosts, perhaps when doing vmotion you lose connection for a split second but that is enough to send the cluster into failover mode.  

If a node fails the other node will take over so pinning the VMs to a particular host should work just find.
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65tdRetiredCommented:
Is the cluster configured to use a VCO?

See the link for addition information:
http://blogs.msdn.com/b/clustering/archive/2008/08/19/8877483.aspx
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