I recently installed Symantec System Center ver. 10 on our application server and also installed Symantec client on the same system making it the Symantec Server. I then made the server the primary server in the group (this is a small network with only 15 clients). We have a Win 2003 network and all the computers are running XP or Win2K except the servers that are running Win2003. After installing SSC and the Symantec Server I went to each computer in the network and uninstalled the old version of Symantec 9 and restarted the system and installed Symantec Client as managed and pointed it to the server, I did that on all 15 computers. Then I went to the server that is running SSC and did a refresh and all the computers showed up in SSC and looked fine. I then went to all the client computers and manually installed the current definitions (it’s a secure network and I have to download the definitions from a secure site and then install the definitions) and then did a refresh in SSC and all the current definitions showed up. The Symantec server was communication with all the client computers and showing the most recent virus definitions on the client computers, and its seemed to be working fine. 2 days later the SSC is showing a status on all client computers a "Time out of sync" I go to the help and it says to configure login certificate lifetime and tolerance. I did this and change it to 9 days and now there is a red X on the server group and all the client computer’s are still showing a “Time out of sync” status. I right click the server group and it says I have to select a primary server, when I try to right click the only Symantec server to again make it the primary server it doesn’t give me the choice to make it the primary server. Can anyone help?