Troubleshooting Outlook Login Errors
Desktop Outlook has this specific, maddening habit of asking for your password over and over, even when you know it's correct. I used to find this baffling too, until I realized it's almost never actually about the account — it's the desktop app itself losing track of something.
Repeated password prompts, correct password
This is usually Windows' saved credentials falling out of sync with what Outlook needs. Open Credential Manager, find anything related to Outlook or your email address, remove it, and let Outlook prompt fresh so it can save the right thing this time.
"Cannot connect to server" during sign-in
- Make sure you can browse the web normally first — a general connectivity hiccup will disguise itself as an Outlook problem.
- Check whether Work Offline got toggled on (Send/Receive tab) — this happens more than you'd think, often by accident.
- Try a different network if you're on a corporate connection or VPN that might be blocking the ports Outlook needs.
MFA prompts that loop endlessly
If your account uses multi-factor authentication through work or school, an outdated Outlook build can fail to finish the modern-auth handshake properly. Check for pending Office updates before anything else — I've seen this fix more login loops than any account setting ever has.
When nothing else works: a fresh profile
Control Panel → Mail → Show Profiles → create a new one and add your account fresh. This sounds drastic but it isn't — nothing on the actual mail server gets touched, your messages are exactly where they've always been.