I have recently upgraded my SEPM server to 12.1.2 and everthing seemed to go fine with the upgrade. The only issue I am having is every new agent I install is offline. All of the current agents that were on the server are communicating fine.

Thanks for the help.

Did you reboot the SEP client after the upgrade?

A very similar thread here:

https://www-secure.symantec.com/connect/forums/sep-deployment-failed

Hi,

Do you have create NEW package ?

SEP 12.1 RU2 and Reset Client Communication

https://www-secure.symantec.com/connect/articles/sep-121-ru2-and-reset-client-communication

Symantec Endpoint Protection: Troubleshooting Client/Server Connectivity

http://www.symantec.com/docs/TECH105894

Troubleshooting Client Communication with SEPM

http://www.symantec.com/docs/TECH95789

What is the status of the Client-Server connection if you check in the SEP client GUI -> Troubleshooting -> Management -> General Information?

Does the client has newest policy from SEPM and the current definitions?

How are you performing the new installations? Push deployment? Autoupgrade from SEPM? Manual installation?

was the package managed client?

can you post the sylink log?

are the new agents cloned?

How to repair duplicate IDs on cloned Symantec Endpoint Protection 12.1 clients

http://www.symantec.com/business/support/index?page=content&id=TECH163349

Thank you for the quick response on this issue.

@Brian81 I did Reboot the computers after the install finishes 

@Ashish These are all new endpoint that I am adding to the server so they have never had Symantec on them. 

@SebastianZ It shows offline for the server connection. I am pushing the install with the deployment of our imaging system, but The install is not in the image. We use Dell Kace and it pushes it as a Post deployment install.

@pete_4u2002 It was a fresh install and the package was created by the server

I did find this while I was looking around it show that the client knows about the server but the server can't make the connection.

HI,

Try to export sylink.xml and replace.

also check connectivity

Symantec Endpoint Protection: Troubleshooting Client/Server Connectivity

http://www.symantec.com/docs/TECH105894

Troubleshooting Client Communication with SEPM

http://www.symantec.com/docs/TECH95789

Replace the sylink file on one client with the one from the SEPM. Right click on a group in SEPM and Export Communication Settings and replace on the client. See if it makes the connection than

From the error message you posted:

I tried the Sylink.xml replacement and it didn't change. I upgraded from 12.1 the latest version before 12.1.2 so I don't think any major changes happened. 

Hi,

Can you check Client Connectivity between SEP Client and SEPM server ?

are you able Telnet Port 8014 ?

Symantec Endpoint Protection: Troubleshooting Client/Server Connectivity

http://www.symantec.com/docs/TECH105894

Can you check the scm.server.log from SEPM for any repeated errors?

-> SEPM install folder/tomcat/logs/scm-server-0.log

-> SEPM install folder/tomcat/logs/scm-server-1.log

How many clients are in your network which are already installed and working fine?

Also please check you have another license available to manage the new clients from Server. This may be the reason for the client offline..

https://www-secure.symantec.com/connect/forums/sepm-121-licensing-status

Hi

Please try to ping the SEPM server

Regards

Waiting for your revert on above comment.

Agreed with above comments, Please follow the same will get your solution.

I'm sorry for not getting back to everybody got pulled away on another project. The issue is actually resolved I'm still not sure what was wrong but I created a new sylink package from the server and installed it on one of the new clients. It started to be able to talk to the server along with all the other client that had been blocked. I am not sure what the new sylink package opened up that the old one did not have (made from the same server) but it allowed the server to start talking to the new clients.

Thanks for getting back to us.  Just a follow-up question.  Did you install a package to the new clients or did you install the non-managed client from the CD?