Endpoint Protection

The client is 12.1 as the Server.

The clients get all defenitions and policy from the SEPM - and its working FINE!

the problem is that the clients dont show the green dot. thats it.

what can be the problem?

I already tried to restart services, update content, remove manually some clients and seen that they coming back.

I even tried to restart the computers and servers itself...

Ps: We after a Upgrade from 11.6 MP3

This can happen, if you are using Ghosted/cloned machines.

1 of 2 (3, 4, etc.) imaged machines is communicating with the server at any given time.  It receives it's updates until another machine retrieves communication with the server, at which time it will update.

Hello,

What do you see when Reviewing the local SEP client GUI, "Help > Troubleshooting > Last Connected

Check this: http://www.symantec.com/docs/TECH162756

Again, If they are Cloned / Imaged machines.., 

Please Follow this Article:

Try this might help

Open regedit. Go to:

HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings

If there's an item called GlobalUserOffline OR Saved legacy and default legacy delete it.

Reboot the machine

Client connected to SEPM but not showing green dot

Solution :-

Please change your Symantec Endpoint Protection Manager server Date format to any other one.

Following activity to change the SEPM Server Date format.

1.      Open and login the SEPM Server Console.

2.      Go to SEPM server Home opetion.

3.      Click on Prefrences and click on log and setting option and change the Date format to diffrent and restart your server machine.

Your client will be come with green dot in server machine.

Please check that the port 8443 is open bi-directionally

Regards