I can no longer access Outlook on my Samsung cellphone

Try this end-to-end reset path on the Samsung S24+:

1. Confirm whether the account still works in a browser.
   • If this is an Outlook.com account such as Hotmail, Live, or Outlook.com, sign in through the Microsoft account flow and verify the account is accessible.
   • If the account works on a computer but not on the phone, the issue is likely with the mobile app or phone setup.
2. If the Outlook app is stuck in a sign-in loop, remove and re-add the account.
   • In Outlook mobile, go to Settings.
   • Select the affected account.
   • Select Delete Account.
   • Add the account again.
   • This is the documented fix if the issue started after changing the primary alias, and it is also a common reset step for mobile sign-in problems.
3. Clear the Outlook app state on Android, then reinstall.
   • If Outlook crashes or continues failing to sign in, clear the device browser cache, remove the Outlook app, and reinstall it.
   • On Android, a clean setup can also include clearing the Outlook app cache/data before signing in again.
4. Update Outlook mobile to the latest version.
   • Recurring password prompts can happen because the app’s security standards were updated.
   • Installing the latest Outlook mobile version is a recommended fix.
5. If the account is a Microsoft personal account, use the Microsoft sign-in helper.
   • The sign-in helper checks the account details entered and identifies common sign-in problems.
   • Start here: Start
6. If the account is a Microsoft 365 work or school account:
   • Use the self-service password reset if allowed: Reset password
   • If self-service reset is not allowed, the next step is the organization’s IT admin.
7. If Samsung Email is being used instead of Outlook:
   • Manual IMAP/POP setup will sync only email, not calendar or contacts.
   • For Outlook.com, the outgoing SMTP server is smtp-mail.outlook.com, security type TLS, port 587.
   • For Microsoft 365 for business, the outgoing SMTP server is smtp.office365.com, security type TLS, port 587.
   • For Exchange accounts, contact the email provider or system administrator.
8. If none of the above works:
   • In Outlook mobile, go to Settings > Help & Feedback > Contact Support.
   • For Outlook.com accounts, Microsoft support is also listed as the support path.

Notes based on the symptoms:

• If email still works on a computer and there is no Outlook.com outage, the problem is likely on the phone or in the app.
• If the account was added as IMAP or POP, calendar and contacts will not sync; Exchange ActiveSync is required for those.

• Troubleshoot Outlook mobile issues
• Can't sign in to the Outlook mobile app
• After I changed my primary alias on my outlook.com account, I can't log back in
• Set up email in Android email app