I have installed a Sametime 9 System Console and Community server.
Even though I have unchecked this setting in SSC
User must set this community as the default server community (IC)
And restarted server several times.
The users still get "To log into the XXX.YYY.ZZZ" server community, it must be set as your default server community. Either reset user to login directly or contact your system administrator.
After a few reboots of sametime server the problem went away.