Hi @azoupas I understand the points, but I want to run one more concern by you. In Flex-3, let's suppose you want to add a Professional user to your permanent base.  The CUCM side of things permits this per the above, but consider that a professional...

In regards to this part:   You can have a mix of perpetual licenses with SWSS and Flex 3 licenses on same CUCM.   Two things got my attention:1. Only CUCM is mentioned.2. It implies SWSS must be active in the perpetual licenses. Do other apps involve...

That would be the Trade Tool application at:   https://gcta.cloudapps.cisco.com/FinAdm/GCTA/servlet/ControllerServlet?action=QueryForm

Hello David.At this time, the latest Expressway release notes say "Jabber SDK is not supported over MRA."  However you indicate "Expressway is fully supported by the Jabber Voice & Video SDK, just not by the CAXL IM&P library." which might be interpr...