After upgrade or install of Symantec Endpoint Protection client version 14.2 RU1 or newer the Windows Firewall options are grayed out and remain unavailable when you disable the SEP client firewall component from the tray icon.
SEP Client version 14.2 RU1 and newer
Windows Firewall options in Windows 10 Security Center
The Windows Firewall options are grayed out and not available when the SEP Firewall is disabled by the tray icon.
This is under investigation
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