Outlook usually asks again and again when something about your sign-in has changed.
- Check you’re online: can you open a website?
- Did you change your password recently, on another device? Type the new one when Outlook asks.
- In Outlook, go to File → Office Account, choose Sign out, close Outlook, open it again and sign back in.
- Restart your computer. A proper restart (not just closing the lid) clears a lot of sign-in problems.
- Try Outlook on the web. If that works, your account is fine and it’s Outlook on this computer that needs a hand.
Still asking?
Raise a request or start a remote support session and we’ll fix it for you. Please don’t share your password with anyone, including us: we never need it.