Hello Anonymous,
The recovery key is not always stored only in the Microsoft account used to install Windows.
Please note the recovery key ID shown on the BitLocker screen, then check:
- Every personal Microsoft account previously used on the device: View BitLocker recovery keys
- Any work or school account connected to the device
- The account of anyone else who originally configured the device
- Any printed copy or USB drive where the key may have been saved
If the recovery key cannot be found in any of these locations, Microsoft Support cannot retrieve, recreate, or bypass it. Unfortunately, the encrypted data cannot be accessed without the key.