18.9.11.1.3 Ensure 'Choose how BitLocker-protected fixed drives can be recovered: Recovery Password' is set to 'Enabled: Allow 48-digit recovery password'

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Information

This policy setting allows you to control how BitLocker-protected fixed data drives are recovered in the absence of the required credentials. 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: Allow 48-digit recovery password.

Rationale:

Administrators should always have a safe, secure way to access encrypted data in the event users cannot access their data.

Additionally, as with any authentication method, a drive can be compromised by guessing or finding the authentication information used to access the drive.

To use BitLocker, a Data Recovery Agent will need to be configured for fixed drives. To recover a drive will require highly-controlled access to the Data Recovery Agent private key.

Impact:

A 48-digit recovery password will be permitted for fixed drives.

Solution

To establish the recommended configuration, set the following Device Configuration Policy to Enabled: Allow 48-digit recovery password:

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/Fixed Data Drives
Setting Name: Choose how BitLocker-protected fixed drives can be recovered
Configuration: Allow 48-digit 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

https://workbench.cisecurity.org/files/3358