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Hi, Blancorojo Bus
Since Personal Vault opens in the iOS app, the files and account are still accessible. The unlockRequired error only on the Mac strongly points to the additional web verification step failing, rather than a normal browser cache problem. Personal Vault requires a separate identity check each time it is unlocked.
Here are some suggestions you can try:
Try the latest version of Firefox or Microsoft Edge, then select another verification method if offered, preferably Microsoft Authenticator rather than the same email. Supported web browsers include current Edge, Chrome, and Firefox.
Temporarily disable any VPN, ad blocker, privacy extension, or strict tracking protection, and allow pop-ups and third-party cookies for OneDrive and Microsoft sign-in pages.
If it still fails, further cache clearing or reinstalling OneDrive is unlikely to help because the problem affects the web unlock flow.
Contact Microsoft Support and request escalation to the OneDrive team for a “Personal Vault web unlock authentication failure.” Include the correlation ID, the exact date/time and time zone of the latest failure, affected browsers, and confirmation that iOS access works. Ask them to review the account/server-side Vault unlock state and authentication logs.
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Thank you for your patience in reading, I hope this information has been helpful to you.
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