Android Phone Chrome can't join the cms2.3.3 conference. Did you know?

I have on-premise register is succeed DX80, but can not registered by Expressway. DX 80 Message alert : "Phone features unavailble", but when DX80 in Internal network then no proplem. - DX80 ver: 10-2-4-99.k3 -  CUCM 10.5.2.12901-1 - EXPRESSWAY C/E:...

Hi All,I have successfully installed and configured CUCM 10.5.2.10000-5 , but I proceed to install the IM&P server 10.5.2.1000-9 on the same node, the prompt error. "This is not the First Node in the cluster"This is IM and Presence Server version 10....