Greetings, I am hoping this is a relatively simple question - but I can't find a lot of specific information on what I am attempting to do - although I have found enough to believe that this configuration is possible. I have 2 FS hosts (FreeSWITCH Version 1.6.19~64bit) behind a Kamailio server. Kamailio is routing REGISTER and INVITE requests to both using the Dispatcher module. I have a single MySQL server shared by both FS hosts and mod_sofia is properly using the shared MySQL server via ODBC on the back-end. I have two softphones registering through Kamailio and all is good. I can see both registrations in the "sip_registrations" table. The problem comes in when I try to call one of the extensions. If the INVITE arrives on the opposite server to the last REGISTER for that extension - the FS server can't see the registered user since the "hostname" is different now. I can experiment with it by using "sofia_contact 1000" on both servers - and only the last server that accepted the REGISTER sees the user, the other returns "error/user_not_registered". Can anyone point me in the right direction to understand what might need to be changed to allow both FS servers to share the same records in "sip_registrations"? Thanks, Geoff