After upgrading to Endpoint Protection (SEP) / Symantec Endpoint Security (SES) 14.3 RU7, you noticed an increase in GPO events 1502 every 5 minutes in Windows Event Viewer:
Release : 14.3 RU7 (build 9689)
This issue has been fixed in 14.3 RU8.
Workaround (Cloud):SES
Workaround (On-Prem):SEP
Note: Clients will get the updated policy based on the Heartbeat.
Let the Symantec Agent coexist with Windows Defender
Note: Enabling this option delays Auto-Protect detections. Disable the option if Windows Defender is disabled on your devices.