The recovery key in your Microsoft account cannot unlock this drive if its Key ID does not match the ID displayed by BitLocker; locate a matching key in another supported backup location.
Identify the required key
- On the BitLocker screen, write down the first eight characters of the recovery key ID.
- Look for a key whose ID matches those characters exactly.
- Enter that key’s 48-digit recovery key—the Key ID itself is not the unlock code. ^1^
Since the key under your only known Microsoft account has a different ID, do not use it; it belongs to another BitLocker key protector or drive.
Check the remaining supported locations
- Another person’s Microsoft account: If someone else originally configured the PC or enabled encryption—such as a family member, seller, or repair technician—the key may be in that person’s account.
- Work or school account: If the PC was ever connected to an organization, sign in at https://aka.ms/aadrecoverykey, select Devices, expand the device, and choose View BitLocker Keys. Otherwise, give the displayed Key ID to the organization’s IT department.
- Printed copy: Check paperwork stored with the PC.
- USB drive or saved text file: Check USB drives, external storage, and backed-up files for a BitLocker recovery-key text file.
Microsoft documents all these possible storage locations. On Windows 11 version 24H2, the recovery screen may also show a hint identifying the Microsoft account associated with the key. ^1^
If no matching key exists
Microsoft Support cannot retrieve, provide, or recreate a lost BitLocker recovery key. There is no supported way to bypass BitLocker while preserving the encrypted files.
The remaining option is to reset or reinstall Windows, which removes the files on the encrypted drive. Do not proceed if the data is important until every possible account, USB drive, printout, saved file, and organizational account has been checked. ^1^
References