Recently I came across an issue turning on BitLocker with the error on a Windows 10 device
BitLocker Drive Encryption cannot be applied to this drive because there conflicting Group Policy settings for recovery options on fixed data drives.
Also got the error before starting the troubleshooting
You can’t create both a recovery password and a recovery key
The policy to enable and enforce BitLocker is set on Intune/Endpoint Configuration Manager and the device has been refreshed (auto-pilot).
The device used to already have BitLocker enabled before the refresh process and re-assignment to another user.
After some troubleshooting and investigation, it was found that a registry key was the root cause of this ‘so called conflict’
with the below values
The FVE key is not created by Intune policy and should not be present when BitLocker is managed by Intune.
Deleting the complete FVE key solved the problem.