From your laptop, open the Microsoft recovery-key page, sign in with the Microsoft account used on the desktop, and match the listed 48-digit key to the Recovery Key ID shown on the desktop.
Retrieve the key from your laptop
- On the desktop’s BitLocker recovery screen, note the first eight digits of the Recovery Key ID. This identifies the correct key if the account contains several keys.
- On your laptop, open https://account.microsoft.com/devices/recoverykey.
- Sign in with the same Microsoft account that was used to set up the desktop.
- Find the entry whose Key ID matches the ID displayed on the desktop.
- Enter its corresponding 48-digit recovery key on the desktop. ^1^
If the desktop runs Windows 11 version 24H2, its recovery screen may show a hint identifying the associated Microsoft account. If another person originally configured the desktop or enabled BitLocker, the key may instead be in that person’s account. ^1^
If the key is not in that account
Check these locations:
- Other Microsoft accounts that were previously used to set up the desktop.
- Work or school account: open https://aka.ms/aadrecoverykey, sign in, select Devices, expand the desktop, and select View BitLocker Keys. If the organization controls access, contact its IT department.
- A printed copy stored with the desktop’s paperwork.
- A USB drive or text file where the key may have been saved. Read the file using the laptop if necessary. ^1^
If no key can be found
BitLocker cannot be bypassed, and Microsoft Support cannot retrieve, provide, or recreate a missing key. The remaining option is to reset or reinstall Windows, which removes the files on the encrypted desktop drive. Do not reset it until all possible accounts, printed records, USB drives, and organizational records have been checked. ^1^
References