Our guidance at this time is that Windows
Management Framework 3.0 should not be deployed on servers
running Exchange 2007 or Exchange 2010, or on workstations with the Exchange
Management Tools for either version installed. If you have already deployed
this update, it should be removed. Once you remove the update, functionality
should be restored.

The link for full details http://blogs.technet.com/b/exchange/archive/2012/12/14/windows-management-framework-3-0-on-exchange-2007-and-exchange-2010.aspx