Detections
Analytics
18.9.11.2.8 Ensure 'Choose how BitLocker-protected operating system drives can be recovered: Do not enable BitLocker until recovery information is stored to AD DS for operating system drives' is set to 'Enabled: True'
Warning! Audit Deprecated
This audit has been deprecated and will be removed in a future update.
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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.Select the 'Do not enable BitLocker until recovery information is stored in AD DS for operating system drives' check box if you want to prevent users from enabling BitLocker unless the computer is connected to the domain and the backup of BitLocker recovery information to AD DS succeeds.
Note: If the 'Do not enable BitLocker until recovery information is stored in AD DS for operating system drives' check box is selected, a recovery password is automatically generated.
The recommended state for this setting is: Enabled: True (checked).
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:
Users will need to be domain connected and the back up of BitLocker recovery information for the operating system drive must succeed in order to turn on BitLocker. This policy is not FIPS complaint.
Solution
To establish the recommended configuration, set the following Device Configuration Policy to Enabled: Do not enable BitLocker until recovery information is stored to AD DS for operating system drives (checked):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 enable BitLocker until recovery information is stored to AD DS for operating system drives' (checked)
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:
BitLocker can be enabled on the operating system drive without the requirement of storing recovery information to Active Directory first.
See Also
Item Details
References: CSCv7|13.6
Plugin: Windows
Control ID: d385bd12e5246ff85da92524de1fcd7c718ab9520665d3a5f6ee95feaa73c3aa