The NEW MS OUTLOOK - not good and has stopped working

Repair Outlook (new) in Windows first; if the sign-in loop remains, reset it to clear the app’s local authentication state and add the account again.^1^

Repair and reset new Outlook

1. Close new Outlook.
2. Open Start → Settings → Apps → Installed apps.
3. Find Outlook (new).
4. Select the three dots (…) → Advanced options.
5. Select Repair.
6. Reopen Outlook and try signing in once.

If “Access is denied” returns:

7. Return to Outlook (new) → Advanced options.
8. Select Reset, then confirm.

Reset removes local app data and account configuration, so Outlook will ask you to add the account again. It does not delete messages held in an Outlook.com, Microsoft 365, Gmail, Yahoo, or other server-based mailbox.

If reset does not resolve it

Uninstall and reinstall new Outlook:

1. Open Start and locate Outlook (new).
2. Expand its options and select Uninstall.
3. Restart Windows.
4. Open Microsoft Store, search for new Outlook, and select Get or Install.
5. Open it and add the account again.

Microsoft documents uninstalling and reinstalling new Outlook as the applicable recovery method when the app stops working.^2^

Do not use classic Outlook’s profile repair, Control Panel Mail profiles, or classic Outlook troubleshooters for this problem. Microsoft states that those tools do not apply to new Outlook for Windows.^3^

Determine whether the account itself is blocked

If reinstalling does not help, test the same mailbox directly in its webmail service:

• If webmail works, the fault remains specific to the Windows app or its local authentication components.
• If webmail also reports access denied or cannot sign in, repairing Outlook will not resolve the account-side problem.

For a personal Microsoft account such as Outlook.com, Hotmail, Live, or MSN, use Microsoft’s sign-in helper or contact support. Microsoft’s support page provides both routes and notes that support availability can depend on the product and subscription.^4^

For a work or school account, ask the Microsoft 365 administrator to check:

• Whether sign-in is blocked.
• Whether the user account is active.
• Whether the required license remains assigned.
• Whether the Exchange Online mailbox is available.
• Whether an organizational policy restricts the account used by new Outlook.

New Outlook can be configured so that its primary account must match the account signed into Windows, and administrators can also prevent personal accounts from being added.^5^

Until the issue is resolved, use the mailbox through its browser-based webmail interface.

References

1. Outlook access denied, asking for password - Microsoft Q&A
2. Outlook for Windows not responding, hangs, freezes, or stops working
3. Resolve Outlook for Windows issues with automated troubleshooting tools | Microsoft Support
4. Contact Microsoft customer support | Microsoft Support
5. Supported accounts in new Outlook for Windows