Hi,
It's a permission issue.
SEP support tool log says local security policy's network access ,sharing and security model is set to : guest, only local users authenticate as a guest
Possible cause of issue :
1) A local Security Policy (GPO) is limiting stop/start of Symantec Endpoint Protection service when clients are not connected through LAN to corporate network
2) The GPO policy does not include group of "Authenticated Users"Try following steps :
Possible solution
1) Remove limitation of handling of Symantec Endpoint Protection service through the GPO in local policies -> Security options
2) Alternatively you may include group of "Authenticated Users" in the GPO