The offical Cisco stance is probably no according to this doc.
http://www.cisco.com/en/US/docs/voice_ip_comm/unity/5x/support/5xcusupp.html
Cisco TAC will let you have software installed until they reach a point that they can no longer troubleshoot an issue and then ask you to uninstall it.
I would test it in the lab before you install it if you want to.
If it is not on the list then Cisco has not tested it. They can not test every software and that is really the main reason.
Hope this helps you make a decision.
Randy