Yes, see page 244 of the admin guide;
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I tried X8.1 - calls from Lync2013 on iPad to Cisco endpoints works fine, but calls from Lync2013 on android devices or iPhone (5) - fails =(
In the VCS 8.1 release notes it states the Microsoft Interoperability option key is formerly known as the Enhanced Microsoft Collaboration option key. So unless they plan on changing part numbers, they might use the old OCS option key.
Cisco-VCS-Release-Note-X8-1.pdf, bottom of page 1.
Correct, it is same PID (Option key index is 116341C00) and will display as “Microsoft Interoperability” if VCS run with X8.1 software version.
So for those already have “Enhanced OCS Collaboration” option key installed, VCS will automatically update option key as “Microsoft Interoperability” once software is upgraded.