Many clients in different groups failed to connect to the network after upgrading.
The Network access control module disappeared in the client panel.
00000064 01cc87f8ba299bde 1207020e 00000000 00000000 00000000 location has been changed to Default。 Smc
0000007b 01cc87f8ba3caeae 12070700 00000002 00000000 00000000 stop Symantec Network Access Control client。 NacMan
00000084 01cc87f8bdf3f8f4 12070301 00000000 00000000 00000000 Conected to Symantec Endpoint Protection Manager (YNFHSEPM002) Smc
0000007d 01cc87fd00219bce 12070700 00000002 00000000 00000000 Symantec Network Access Control client started。 NacMan
0000006c 01cc87fd00219bce 12070700 00000002 00000000 00000000 The SNAC driver has been uninstalled NacMan
Firstly it was consider as something wrong with the SNAC module upgrading. But according to the logs, It was cause the policies changed.
The group policy inheritance is turned on by mistake. The location specific policies and setting changed, and the new policies don't contain the HI checking. So the clients uninstall the SNAC driver.
Copy the correct policy from another group, and paste it to the target group. Then the clients recover. And Suggest the customer to assing all the policies to the groups again if possible.
Windows 2003, SEPM 12.1