outlook stoppped working

Reset the mailbox password on your email provider’s website first, confirm that the new password works in webmail, and then use that password when classic Outlook displays “Sign in required — Sign in to resolve.”

1. Recover the correct mailbox password

1. Open your email provider’s website in a browser—Gmail, Yahoo, or the company that supplies your address.
2. Try signing in with your full email address and current password.
3. If it fails, select the provider’s Forgot password or Reset password option.
4. Complete the provider’s account-recovery process and create a new password.
5. Sign out of webmail, then sign in again with the new password to confirm it works.

The password cannot be reset from Outlook; third-party passwords must be changed through the email provider. ^1^

2. Sign in again through Outlook

1. Open classic Outlook.
2. Select the Sign in required notification.
3. If a provider sign-in page opens, enter:
   • Your full email address
   • The newly confirmed password
4. Approve any provider permission request needed to connect Outlook.
5. Allow Outlook a few minutes to synchronize. If it does not resume immediately, close and reopen Outlook once.

Passwords are case-sensitive, so check Caps Lock and ensure the username is the complete email address. ^2^

If the provider asks for an app password

Only use an app password if the provider or Outlook explicitly says one is required. Generate it on the provider’s account-security page, then paste that generated password into Outlook instead of the regular mailbox password. ^3^

If webmail works but Outlook still does not

• Look at the bottom of Outlook. If it says Working Offline, select Send/Receive → Work Offline once to return online.
• If it says Disconnected or Trying to connect, confirm that ordinary websites open in your browser.
• Do not remove the email account yet. First note any exact error code shown under Send/Receive → Show Progress; that code determines whether the next step is credential repair, account-setting repair, or profile repair.

References

1. Change or update your email password in Outlook for Windows | Microsoft Support
2. Troubleshoot Outlook email setup | Microsoft Support
3. [New Outlook](https://support.microsoft.com/outlook/i-can-t-send-or-receive-messages-in-outlook#have-you-changed-your-password-recently)