Once done, re-add the secondary SEPM server with the primary SEPM server as replication partner. If you have another SEPM server and that is replication partner with the primary server then upgrade that SEPM server with the above steps. For the clients that are configured for pull mode, the management. Otherwise it will download the updates during installation and it will take long time to finish the upgrade. You can use this method if you want to perform a manual update on a particular client. Now goto the download folder and Execute SEP’s setup.exe file as shown.Stop Symantec endpoint protection manager service in services.msc.Right click the Local Site for options to remove replication partner. In the SEP console Manager -> Admin tab -> Servers. Remove replication partner in the SEP console manager.If you have two SEP Manager server, you need to first remove the replication partner, upgrade them separately and then you need to add them as replication partner in the SEPM console.Take a clone of the SEP server before the upgrade as a safety measure.Have around 50GB of free space on the drive where SEP is installed. Space required for SEPM upgrade: 3 times the DB on disk.Remove any replication partner in the SEPM primary server before the upgrade.That account will be replicated to replication partner server (if you have). You can create local login credential in SEP manager console. Enable local authentication on SEP Manager Console.To download, you need to enter the Serial number of your Symantec endpoint Protection.

First download Symantec Endpoint Protection from Symantec Fileconnect.

Symantec endpoint protection 15 upgrade