trying to restore one drive to 3 weeks ago but keep getting error messages about personal vault

Since the target is one file, search for that file before rolling back the entire drive. On OneDrive for the web, search by part of the name, check Recent and Shared, then open the Recycle bin. Unlock Personal Vault in the same browser session and check whether the missing file or its parent folder was stored there. If the file still exists, open Version history and restore only the needed version. Before using Restore your OneDrive, download copies of any files created or changed after the proposed restore point. The full-drive operation reverses many actions across OneDrive, so it can undo good changes while recovering the missing one. Keep Personal Vault unlocked, start the restore from OneDrive Settings, and review the activity list for the deletion or move before confirming the date.

If the vault error returns, capture its exact text, UTC time, browser, account type, and any correlation ID, then open a private Microsoft OneDrive support case. Do not reset or delete Personal Vault as a troubleshooting step. A vault access problem and a missing ordinary file can be separate issues, and deleting the protected container can make recovery harder.