Open Outlook.com in a private browser window first; this will identify whether the failure is caused by normal-browser sign-in data, the computer’s connection, or the classic Outlook application.
- Open Microsoft Edge.
- Select Settings and more (…) → New InPrivate window.
- Open Outlook.com, select Sign in, and enter your full Outlook/Hotmail email address and Microsoft account password.^1^
Then follow the matching result:
- It works in InPrivate but not in the normal browser:
In the normal browser, open Settings → Privacy and security → Cookies and site data. Remove site data containing Microsoft, Live, or Outlook, close every browser window, reopen Edge, and try again.^2^
- The page still times out or says it cannot be reached:
Check Microsoft’s service status. If the status is not green, wait until service is restored.^3^
- The service is operating normally:
Temporarily disconnect any VPN or proxy, then test using another connection such as a phone’s mobile hotspot. If the hotspot works, the original Wi-Fi, router, DNS, firewall, or web-protection software is blocking the connection. If testing third-party antivirus web protection, disable it only briefly and re-enable it immediately afterward.^4^
This means access to the account and website is working, so troubleshoot classic Outlook separately.
- Close Outlook.
- Press Windows key + R.
- Enter:
outlook.exe /safe
- Select OK and try signing in.
Safe mode starts classic Outlook without add-ins. If sign-in works there, go to File → Options → Add-ins → Manage: COM Add-ins → Go, clear the add-in checkboxes, and restart Outlook normally. Disable add-ins rather than removing them.^5^
If safe mode does not help:
- Open the Windows Get Help app and run an applicable classic Outlook startup or profile setup troubleshooter. These troubleshooters do not apply to new Outlook.^6^
- If this is Microsoft 365 or Office sign-in, run the Microsoft Support and Recovery Assistant’s Office sign-in diagnostic. Microsoft documents it for common Office sign-in problems.^7^
3. If the page loads but rejects the account
Use the Microsoft account sign-in helper. Outlook.com support cannot directly restore access when an account cannot sign in; Microsoft directs users to that helper instead.^8^
When reporting the result, specify whether the failure occurs in Edge at Outlook.com or in the Outlook desktop application, and provide the exact error text or a screenshot with the email address hidden.
References
- How to sign in to Outlook.com | Microsoft Support
- How to Fix Outlook Sign In Issue - Microsoft Q&A
- How to sign in to Hotmail | Microsoft Support
- Unable to sign in to Outlook due to "CONNECTFAILED undefined" error - Microsoft Q&A
- [Classic Outlook](https://support.microsoft.com/outlook/getstarted/outlook-for-windows-not-responding-hangs-freezes-or-stops-working)
- Resolve Outlook for Windows issues with automated troubleshooting tools | Microsoft Support
- How to troubleshoot non-browser apps that can't sign in to Microsoft 365, Azure, or Intune | Microsoft Support
- How to get support for Outlook.com | Microsoft Support