OneDrive Personal Vault cannot unlock, error code 0x8004db90

I have seen the exact same problem, but the error code was 0x8004db94 and not 0x8004db90

In my case, I managed to fix this issue following these steps given by a Tier-3 Microsoft Engineer:

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Some users reported they didn't see the "Restore files" as the screenshot at the end of these steps, so make the backup as below:

Access your files on the Onedrive web page (https://onedrive.live.com/), then go to "My Files" --> open the Personal Vault folder and download your files before

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1) Exit OneDrive

2) Open Command prompt from start menu and paste the following command and hit enter:

REG DELETE HKCU\Software\Microsoft\OneDrive\Accounts\Personal /v VaultBackupGuid
Its ok if this returns ERROR: The system was unable to find the specified registry key or value. Just continue following the next steps.

3) Open Credential Manager from start menu

4) Select the Windows Credential tab

5) Find the credential named "Microsoft OneDrive Generic Data - Personal Vault VHD info" and click Remove.

6) Restart OneDrive and try to unlock the Vault

Then, when you log-in again if do you see this message below, click on RESTORE, otherwise you will lost your files from the Personal Vault.

These steps above worked for people talking aobut this issue in another post:

https://answers.microsoft.com/en-us/msoffice/forum/all/onedrive-error-0x8004db94/44362d63-da4b-4831-81b7-bfd71aaaeee4

Follow these steps by your own risk because I cannot guarantee it will work to everyone :-)

Hi Tracy,

Thanks for your reply. I've tried the your suggestions but it doesn't help :(

1. I've tried creating a new Microsoft account and confirmed that I can access personal vault for the new account on the web page, but I still cannot access my own account's personal vault on the web page
2. I've tried adding an alias to my original account, and also making that alias the primary email and re-login to OneDrive. That still doesn't help.

I have submitted it on the feedback platform here https://feedbackportal.microsoft.com/feedback/idea/7b9c38eb-d559-ef11-b4ad-000d3a0e6a3a Hopefull it get picked up :(

Screenshot if trying to access via Microsoft Edge.

Tracy,

I get the exact same issue if I'd like to access my Onedrive via my browser (Edge).

Hi Tracy,

I have the exact same problem (Error Code 0x8004db90).

It started a few days ago.

I tried various things like resetting Onedrive, but had no luck.

Please help.