Microsoft 365 and Accounts
Microsoft 365 sign-in or password problem
Resolve repeated password prompts, lockouts, and MFA loops in Outlook and Teams.
Help center
- Sign in at office.com in a private browser window. If that works, the problem is the desktop app, not your account.
- Confirm the time and date on your phone are automatic — a wrong clock breaks authenticator codes.
- In Outlook, choose File, Office Account, Sign out, then sign in again.
- If you get an approval prompt you did not request, deny it and open a ticket immediately.
Never send your password to us or to anyone. We can reset access without it.
Updated 2026-08-31