After turning on ActiveContentScanning with xmlmodifier with the command below, restarting the Symantec Protection Engine service fails to start.
C:\Program Files\Symantec\Scan Engine>xmlmodifier -s //policies/ThreatPolicies/ActiveContentScanning/@enabled True policy.xml
The problem is the capitalized T in the word True. The correct values for this command would be lowercase true or false.
C:\Program Files\Symantec\Scan Engine>xmlmodifier -s //policies/ThreatPolicies/ActiveContentScanning/@enabled true policy.xml
Run the command with the correct value true or false. Then restart the service.
C:\Program Files\Symantec\Scan Engine>xmlmodifier -s //policies/ThreatPolicies/ActiveContentScanning/@enabled true policy.xml