Click on Policy Management > Create new policy
Choose from compliance-recommend policies on the left side or start from scratch.
You can choose to create macOS and Windows both or Windows only. For Windows, we will be using the BitLocker policy.
Just so you know, BitLocker will only work on Windows 10 Pro or 11 Pro machines.
Continue to start the BitLocker policy configurations. You can enter "*" to turn on BitLocker for every drive.
You can continue to finish the selection of Device groups or devices.