Hi,
Please notice Cisco does not perform testing on 3rd party HW or SW, but MS has a doc on this:
http://social.technet.microsoft.com/wiki/contents/articles/23416.exchange-2013-unified-messaging-with-cisco-unified-communication-manager.aspx
and here is a good reference doc:
http://blogs.technet.com/b/canitpro/archive/2014/04/30/step-by-step-integration-between-exchange-2013-um-and-cisco-unified-communication-manager.aspx
HTH
Regards,
Christian Nuche,
TAC Eng.