Hello AravindKM,
So I have done:
After reinstalling the old SEPM do you restored that old database?
yes
Any keys (server.xml,kestore.jks) you restored?
No key restored. What could I do or should do? (all clients were reinstalled with the SEPM console).
You are telling Communication with server: ok means you are getting green dot in SEPM console and in client?
I mean, that I am able to communicate with Secars, Exchange, etc on my SBS server.
An interesting things, is that in SEPM, my client are "green doted", but not on the client. The communication is lost after 5 or 6 seconds (noted on the logs).
Whether you tried by disabling windows firewall?
If the windows Firewall was a problem, so the client (SEP) on my server should work, and it did not.