Personal vault

Update the verification method in your personal Microsoft account, because Personal Vault cannot open until the email entered matches an existing security method or that method is replaced.

Correct the security information

1. In a browser, open the Microsoft account Security page:
   https://account.microsoft.com/security
2. Sign in with the same personal Microsoft account used in the OneDrive Android app.
3. Select Manage how I sign in.
4. Review the listed verification email addresses:
   • If you recognize the masked address shown by Personal Vault, enter that full address when prompted.
   • If that address is obsolete but another verification method works, select Add a new way to sign in or verify.
5. Add an accessible email address, Microsoft Authenticator, or another offered method.
6. Complete the code verification for the new method. It should then appear as an option for future verification.^1^
7. Return to OneDrive on Android, open Files → Personal Vault, and choose the new verification method. Personal Vault requires this additional identity-verification step on each device.^2^

Do not remove the old method until the new one has been added and successfully verified.

If none of the listed methods are accessible

1. Start signing in to your Microsoft account.
2. At Verify your identity, select I don’t have any of these.
3. Follow the prompts to replace your security information.
4. Be aware that replacing all security information can restrict the account for 30 days. During that period, Personal Vault verification may remain unavailable.^3^

An accepted Microsoft Q&A resolution for the same Android Personal Vault and outdated alternate-email issue also directs users to the security-information recovery page:

https://account.live.com/proofs/marklost

Complete that process in a desktop browser, then retry Personal Vault on Android.^4^

Avoid repeatedly requesting codes while recovery is pending; excessive attempts can cause a temporary verification block. If blocked, stop attempts for at least 24 hours and then use the Microsoft sign-in helper offered by the verification troubleshooter.^3^

References

1. Microsoft account security info & verification codes
2. Protect your OneDrive files in Personal Vault | Microsoft Support
3. Troubleshoot Microsoft verification code issues | Microsoft Support
4. Can't access personal vault one drive - Microsoft Q&A