I have the same problem,  P2P video conference is working fine, when it comes to multi-video conference participant's video stops one by one. Today we have done latest CU10 updates , results the same ...

Lync Enterprise topology running 2 LyncFE with 3 SQL mirrored .

there is backup Pool where single FE and SQL are running ...

Btw, Lync server 2013 is running as on-premise and Lync client  is  lync 2010  ... 

Thank you in advance , 

• Edited by Kadirbek Tuesday, April 07, 2015 4:22 PM