After 14.2 Symantec Endpoint Protection (SEP) upgrade Clients can't get the latest definitions from the Group Update Provider (GUP).
1. Run the Upgrade.bat file on the SEPM Symantec Endpoint Protection Manager Upgrade wizard does not run during migration install process.
2. checked if the GUP is recognized as a GUP the SharedUpdates folder in the client's SEP root folder (e.g., C:\Program Files\Symantec\
Symantec Endpoint Protection\SharedUpdates) Program Files X86 if 64 bit.
3. Is the client configured as GUP is listening on port 2967 (that's the default).
Also check the following:
HKEY_LOCAL_MACHINE\Software\Symantec\Symantec Endpoint Protection\LiveUpdate.
Check the settings for the following keys:
If this key is set to 1, the client uses an internal LiveUpdate server or Symantec
If this key is set to 1, the client uses the management server.
If this key is set to 1, the client uses a group update provider