Detections
Analytics
18.9.11.2.4 Ensure 'Choose how BitLocker-protected operating system drives can be recovered: Recovery Key' is set to 'Enabled: Do not allow 256-bit recovery key'
Information
This policy setting allows you to control how BitLocker-protected operating system drives are recovered in the absence of the required startup key information. This policy setting is applied when you turn on BitLocker.In 'Configure user storage of BitLocker recovery information' select whether users are allowed, required, or not allowed to generate a 48-digit recovery password or a 256-bit recovery key.
The recommended state for this setting is: Enabled: Do not allow 256-bit recovery key.
Rationale:
Should a user lose their primary means for accessing an encrypted OS volume, or should the system not pass its boot time integrity checks, the system will go into recovery mode. If the recovery key has not been backed up to Active Directory, the user would need to have saved the recovery key to another location such as a USB flash drive, or have printed the recovery password, and now have access to one of those in order to recovery the system. If the user is unable to produce the recovery key, then the user will be denied access to the encrypted volume and subsequently any data that is stored there.
Impact:
A 256-bit recovery key will not be permitted for the operating system drive. Users will need to be domain connected to turn on BitLocker. This policy is not FIPS complaint.
Solution
To establish the recommended configuration, set the following Device Configuration Policy to Do not allow 256-bit recovery key:To access the Device Configuration Policy from the Intune Home page:
Click Devices
Click Configuration profiles
Click Create profile
Select the platform (Windows 10 and later)
Select the profile (Administrative Templates)
Click Create
Enter a Name
Click Next
Configure the following Setting
Path: Computer Configuration/Windows Components/BitLocker Drive Encryption/Operating System Drives
Setting Name: Choose how BitLocker-protected operating system drives can be recovered
Configuration: Do not allow 256-bit recovery key
Select OK
Continue through the Wizard to complete the creation of the profile (profile assignments, applicability etc.)
Note: More than one configuration setting from each of the Configuration profiles (ex: Administrative Templates, Custom etc.) can be added to each Device Configuration Policy.
Note #2: This recommendation can also be set using the Endpoint protection profile using Windows Encryption settings.
Default Value:
Recovery options are specified by the user.
See Also
Item Details
References: CSCv7|13.6
Plugin: Windows
Control ID: ae0bbd4213d87dc5e59ecfd2505de0744c77af1a8aeabaa6c882c422e7f17344