Hi, We have problems with establishing simple conferencing between OCS 2007 clients.
An error occurred while trying to start the conference. More details (ID:504) The following message was not delivered to all participants. More details (ID:504)
In MS page I found KB944686 which must solve the problem,but this patch ir suppressed by KB943083. after the install, all communicators are 2.0.6362.36 version, but the problems still exists.
Problem was with frond end OCS 2007 server IM conferencing IP address option. Since out server has 3 internal interfaces (for some internal webs and etc), and only one was dedicated to OCS. 5062 port must listen on ALL interfaces (i don't know why, but it solved my problem)