Policy
Allow access to BitLocker-protected removable data drives from earlier versions of Windows
Windows 11 25H2
Policy overview
Key metadata and intent for this policy.
Supported OS tags: Windows11, Windows7, WindowsServer2008R2, WindowsServer2022
This policy setting configures whether or not removable data drives formatted with the FAT file system can be unlocked and viewed on computers running Windows Server 2008, Windows Vista, Windows XP with Service Pack 3 (SP3), or Windows XP with Service Pack 2 (SP2) operating systems. If this policy setting is enabled or not configured, removable data drives formatted with the FAT file system can be unlocked on computers running Windows Server 2008, Windows Vista, Windows XP with SP3, or Windows XP with SP2, and their content can be viewed. These operating systems have read-only access to BitLocker-protected drives. When this policy setting is enabled, select the "Do not install BitLocker To Go Reader on FAT formatted removable drives" check box to help prevent users from running BitLocker To Go Reader from their removable drives. If BitLocker To Go Reader (bitlockertogo.exe) is present on a drive that does not have an identification field specified, or if the drive has the same identification field as specified in the "Provide unique identifiers for your organization" policy setting, the user will be prompted to update BitLocker and BitLocker To Go Reader will be deleted from the drive. In this situation, for the removable drive to be unlocked on computers running Windows Server 2008, Windows Vista, Windows XP with SP3, or Windows XP with SP2, BitLocker To Go Reader must be installed on the computer. If this check box is not selected, BitLocker To Go Reader will be installed on the removable drive to enable users to unlock the drive on computers running Windows Server 2008, Windows Vista, Windows XP with SP3, or Windows XP with SP2 that do not have BitLocker To Go Reader installed. If this policy setting is disabled, removable data drives formatted with the FAT file system that are BitLocker-protected cannot be unlocked on computers running Windows Server 2008, Windows Vista, Windows XP with SP3, or Windows XP with SP2. Bitlockertogo.exe will not be installed. Note: This policy setting does not apply to drives that are formatted with the NTFS file system.
Registry values
How enabled and disabled states update the registry.
| Registry location | Type | Enabled value | Disabled value |
|---|---|---|---|
| HKLM\Software\Policies\Microsoft\FVE\RDVDiscoveryVolumeType | REG_SZ | FAT32 | <none> |
Policy elements
Inputs and configuration options exposed by this policy.
| Element | Type | Registry mapping | Constraints & behavior |
|---|---|---|---|
Do not install BitLocker To Go Reader on FAT formatted removable drives ID RDVNoBitLockerToGoReader_Name | boolean | HKLM\Software\Policies\Microsoft\FVE\RDVNoBitLockerToGoReader Type REG_DWORD | Options: true (1), false (0) True: Set value = 1 · False: Set value = 0 |
Other policies in this category
Explore related policies at the same level.
- ComputerChoose how BitLocker-protected removable drives can be recoveredAt least Windows Server 2008 R2 or Windows 7
- ComputerConfigure use of hardware-based encryption for removable data drivesAt least Windows Server 2012 or Windows 8
- ComputerConfigure use of passwords for removable data drivesAt least Windows Server 2008 R2 or Windows 7
- ComputerConfigure use of smart cards on removable data drivesAt least Windows Server 2008 R2 or Windows 7
- ComputerControl use of BitLocker on removable drivesAt least Windows Server 2008 R2 or Windows 7
- ComputerDeny write access to removable drives not protected by BitLockerAt least Windows Server 2008 R2 or Windows 7
- ComputerEnforce drive encryption type on removable data drivesAt least Windows Server 2012 or Windows 8