Enhanced Hardware Virtualization Support for Exchange 2010
Big changes ! Live migration and Clustered VM hosts Supported now!
The updated support guidance applies to any hardware virtualization vendor participating in the Windows Server Virtualization Validation Program (SVVP).
The Unified Messaging server role is supported in a virtualized environment.
Combining Exchange 2010 high availability solutions (database availability groups (DAGs)) with hypervisor-based clustering, high availability, or migration solutions that will move or automatically failover mailbox servers that are members of a DAG between clustered root servers, is now supported.
White Paper: https://www.microsoft.com/downloads/en/details.aspx?FamilyID=8647c69d-6c2c-40ca-977e-18c2379b07ad