Suppose that I have two user account, for example, A and B in the Jive messenger server. and A had added B to its roster, but A wasn’‘t in B’'s roster.
1)when B is offline, if A logins, B is shown “offline” in A roster
then B log on the server successfully
all online friends in B’'s roster are noticed that B is currently online
Because A isn’‘t in B’‘s roster, so A don’‘t accept this notice message, and can’'t make the status of B updated in its roster.
I wonder which way I can take to make A noticed whenever B changes its presence.