Symantec endpoint server not updating
Symantec recommends that you use this method unless network constraints or your company's policies require an alternative.If you have a large number of clients or bandwidth issues, you might use this method, along with Group Update Providers.It is still possible to manually replace on the client computer if you first disable Tamper Protection.
There is more than one way to point an Endpoint Protection client to an Endpoint Protection Manager.
Leaving an unsupported version of Symantec Endpoint Protection in place when you upgrade the operating system can have unexpected results.
The upgrade to 12.1.6 MP8 from a version earlier than 12.1.5 may take much longer than you expect.
The client (or clients) should begin to appear in the group.
Note: If the client is in a different group than you intended, just right-click the client, click Move, and then select the group in which you want the client to appear.You may need to change the default update method to the clients, depending on the client platform, network configuration, number of clients, or your company's security policies and access policies.