Open Outlook.com in an InPrivate/Incognito window and explicitly select Personal account; if the inbox opens there, remove only the Microsoft, Live, and Outlook cookies from the normal browser to stop the repeating sign-in loop.^1^
Fix the browser sign-in loop
- Close every Microsoft and Outlook browser tab.
- Open a private window:
- Edge: menu … → New InPrivate window
- Chrome: menu ⋮ → New Incognito window
- Firefox: menu ☰ → New private window
- Open the Outlook.com sign-in page from a newly typed address rather than an old bookmark.
- Sign in with the Outlook.com, Hotmail, or Live address.
- If an account-type prompt appears, choose Personal account, not Work or school account. Repeated redirection to the authentication page is a documented sign-in-loop pattern.^2^
If the inbox opens privately, repair the normal browser profile:
- Open the browser’s Settings → Privacy and security → Cookies/site data.
- Find the option to view all stored site data.
- Remove entries containing:
- Close all browser windows, reopen the browser, and sign in again.^1^
If private browsing still loops, try another supported browser or device. Temporarily disable privacy/ad-blocking extensions and allow cookies during the test, because blocked cookies or stale authentication tokens can prevent the sign-in handoff from completing.^3^
If the loop occurs everywhere
- Check Outlook.com service status from Microsoft’s Outlook.com troubleshooting page. If the status is not green, wait for service recovery before changing the account.^4^
- Run Microsoft’s Sign-in Helper. Enter the affected Outlook.com/Hotmail/Live address; it checks for account-level blocks or verification issues and provides the applicable recovery action.^5^
- If Microsoft reports unusual activity or a temporary block, complete the Outlook.com unblock process rather than repeatedly attempting to sign in.^6^
Access to Word, Excel, or other Microsoft services confirms that the Microsoft account can authenticate, but it does not establish that the Outlook.com mailbox session is loading correctly. If the Sign-in Helper reports no problem and the inbox still loops in multiple browsers and devices, contact Microsoft Support and specify: personal Outlook.com account, browser sign-in succeeds, but Outlook repeatedly returns to the sign-in page and never opens the inbox.
References
- How to Fix Outlook Sign In Issue - Microsoft Q&A
- Troubleshoot sign in issues for support.microsoft.com
- EMAIL ACCOUNT/HOTMAIL - Microsoft Q&A
- How to sign in to Hotmail | Microsoft Support
- I can't sign in to my Microsoft account | Microsoft Support
- Unblock my Outlook.com account | Microsoft Support