BitLocker recovery key needed – cannot access account

こんにちは、小林 裕詞

そちらで問題なく動作しているか確認させていただけますか？ BitLocker の回復キーはもう見つかりましたか？ もし追加でサポートが必要な場合は、遠慮なくお知らせください。

Hello @小林 裕詞

Just checking in how’s everything going? Have you been able to resolve the problem?

If so, it would be great if you could share your experience with the community by accepting the answer. Thank you :)

Hello,

Regarding the Microsoft account you mentioned @miyawaki-kogyo.co.jp domain, may I confirm whether this is your work account?

Based on the error code you provided, AADSTS50043 is typically related to login flows where MFA or device identifiers fail during verification. You can find this listed in this official documentation: Microsoft Entra authentication and authorization error codes

Therefore, the password itself is not the issue. If this is a work account, you will need to contact your IT administrator, as only the admin can retrieve the BitLocker recovery key for your device in Azure AD and reset your MFA settings so that you can successfully sign in again.

Here is for your reference: Find your BitLocker recovery key

Please let me know if you have any other questions, I’m happy to help.

If this solved your issue, please mark it as the accepted answer so it can assist others in the community.

Hello, before we begin, may I ask if Japanese language support is available?

I would prefer to communicate in Japanese if possible. Thank you!

To retrieve your BitLocker recovery key when you cannot access your Microsoft account, you can try the following steps:

1. Access Recovery Keys via Microsoft Account: If you are able to regain access to your Microsoft account, you can find your BitLocker recovery keys by visiting https://myaccount.microsoft.com. Under the Devices tab, select your Windows device and choose the option View BitLocker Keys.
2. Contact Support: If you are unable to access your account due to verification issues (like not receiving the verification code), consider reaching out to Microsoft Support for assistance. They may be able to help you recover your account or provide alternative methods to access your recovery key.
3. Check Other Locations: If you have previously saved your recovery key in other locations (like a USB drive, printed copy, or saved in Active Directory), check those as well.
4. Helpdesk Assistance: If your device is managed by an organization, contact your IT helpdesk. They may have procedures in place to retrieve recovery information securely.
5. Recovery Key ID: The recovery key ID you provided (06FA5A35-D784-479C-B04C-4E6FB6CF7D77) can be useful when contacting support, as it helps them identify the specific recovery key associated with your device.

If you still cannot access your recovery key after trying these steps, you may need to consider resetting your Microsoft account security information or seeking further assistance from Microsoft support.

References:

• BitLocker recovery process
• BitLocker recovery overview