How to find BitLocker recovery key

Hello Amornchai Chaichana , I am Henry and I want to share my insight about your issue.

For most users, the BitLocker recovery key is automatically saved to their Microsoft account when the feature is first enabled.

• On another device (like a phone or another computer), open a web browser and go to: https://account.microsoft.com/devices/recoverykey.
• Sign in with the same Microsoft account that you use on the locked computer.
• Once logged in, you should see a list of your devices. Match the Key ID shown on your computer's blue BitLocker screen with the one on the website to identify the correct recovery key.
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If you can log into Windows on the affected computer using another administrator account, you can retrieve the key using the Command Prompt.

• Press the Windows key + X and select Command Prompt (Admin) or Windows PowerShell (Admin).
• Type the following command and press Enter (replace "C:" with the letter of the encrypted drive): manage-bde -protectors -get C:
• The command will display information about the drive's protectors. Your 48-digit recovery key will be listed next to "Numerical Password".

I hope you’ll give my recommendation a try and let me know how it goes and if this answer helps, feel free to hit “Accept Answer” so others can benefit too.

To find your BitLocker recovery key for your device, you can follow these steps:

1. Access the Company Portal: Sign in to the Company Portal website using your work or school account.
2. Navigate to Devices: Go to the Devices section.
3. Select Your Device: Find and select the device (in your case, OLEYOYAPRO9) that is locked.
4. Get Recovery Key: Click on Get recovery key and then select Show recovery key. Your recovery key will be displayed.
5. Use the Key: Write down or copy the recovery key and enter it in the BitLocker recovery screen on your computer. Note that the key will disappear after five minutes for security reasons.

If you cannot find the key, ensure that your device is properly encrypted and contact your IT support for assistance.

References:

• Get recovery key for Windows
• BitLocker recovery: known issues