I am trying to turn on tamper protection for our organization in an attempt to stop end users from installing 3rd party anti-virus software which causes issues with compliance reporting in Intune. I have attempted to turn on this feature in Intune Endpoint Protection (Security Configuration Profile) under Endpoint Protection> Microsoft Defender Security Center> Tamper Protection> Enabled. After looking at the reporting on the configuration profile "Pre-setting status" I see that it has been applied successfully to all devices but when looking at the physical machine, the feature is not enabled (Screenshot). When attempting to change the registry value (Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender\Features)> Tamper Protection, I am presented with an error message (cannot edit TamperProtection: Error writing the value's new contents) shown (Screenshot). I have attempted to elevate my permission on the specific key to grant my self access to edit but am unable to make the change after elevating my permissions. When running the command in powershell to check the status, I see that is not enabled. Please let me know if you need additional information to troubleshoot this issue?