with Microsoft Lync 2010 it's not possible to share content to other participants in a virtual meetingroom on an RMX. It is possible to share content from the CMA Desktop client. And then the content is visible on the Lync 2010's screen.
Does anyone know if this works with Lync 2013? Thx!
As per my experience you would need to add system flag on RMX for content sharing.
There is a setting in the RMX conference that will allow the RMX to send content to legacy devices through the People (video) stream. Thsi will allow an HDX to send content using H239 protocol and the Lync client to recieve the content.
The best alternative is the CSS solution which allows both send/recieve content from/to Lync clients and HDX (h323) endpoints.