Use client version policies to specify the versions of clients
that are supported in your environment. You create or modify
client version policies from Lync Server 2013 Control Panel or Lync
Server 2013 Management Shell.
3.5.6907.xxx
Communicator 2007R2
4.0.7577.xxxx
Lync 2010
15.0.xxxx
Lync 2013