error on outlook on iphone

Question

error on outlook on iphone. After I select my email address "An error ocurred" message

Answer 1

Hello Bill Dowton

From your description, I understand that in Outlook for iOS, when you select your email address during setup, you get a generic "An error occurred" message and can’t finish signing in.

To make sure I don’t repeat what the Q&A Assist reply already suggested: have you tried those steps yet? If yes, which step didn’t work or what happened when you tried it?

Just to confirm, is this email a @outlook.com/@hotmail.com account, or a non‑Microsoft provider (Gmail, Yahoo, ISP email)? And does the error happen only on iPhone, or also if you try to add the same account on another device? (This helps identify whether it’s account-side vs device/app-side.)

In addition, please check the following:

1, Ensure iOS Mail or Outlook app has Background App Refresh enabled in your iPhone's Settings:

Go to Settings > General > Background App Refresh and make sure they're On

2, If the account works on the web but fails only in the app

Microsoft’s Outlook mobile troubleshooting guidance recommends removing/re‑adding the account when sign‑in/sync breaks. Please see Troubleshoot Outlook mobile issues - Microsoft Support

3, Use Outlook’s in‑app support

When the error is generic and the screen doesn’t show details, the fastest way to get targeted help is Outlook’s in‑app support, which lets you contact Outlook Mobile Support from inside the app. You can see this official guide: Get in-app help for Outlook for iOS and Android - Microsoft Support

Please feel free to let me know how it goes so I can help you further. Thank you for your understanding and patience.

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Answer 2

The generic “An error occurred” message in Outlook for iOS usually indicates a problem with the account settings, server connection, or credentials. The exact cause depends on how the account is set up (Exchange, IMAP/SMTP, iCloud, etc.), but the following checks align with common issues in Outlook for iOS:

1. Verify username and password

• Confirm that the email address and password are correct by signing in to the web version of the mailbox (for example, OWA/Webmail or the provider’s webmail site).
• If sign-in fails on the web, the account or password needs to be fixed by the mail provider or IT admin before Outlook for iOS will work.

2. Check if the account uses a different sign-in (UPN) than the email address

• Some organizations require using a UPN (like ******@contso.com) instead of the visible email address (******@contso.com).
• If the account is from an organization, confirm the correct sign-in format with the IT admin and use that in Outlook for iOS.

3. Confirm server details if using manual/IMAP setup

• If the account was added manually (IMAP/SMTP):
  • Ensure the mail server address, username, and password are filled in and correct.
  • If the connection times out or fails, the server name may be wrong; verify with the mail provider or admin.
  • If Outlook reports invalid IMAP server info or IMAP Autodiscover failed, obtain the correct IMAP/SMTP server names and ports from the provider and enter them via Advanced settings.

4. Check SSL/secure connection requirements

• If Outlook reports SSL or certificate errors (for example, invalid/expired certificate or secure connection not available):
  • The mail server may not be configured correctly for SSL, or its certificate may be invalid or expired.
  • Contact the email service provider or IT admin to correct the server’s SSL configuration.
  • Some providers do not support secure IMAP; in that case, Outlook may only connect using an insecure connection if allowed.

5. If using iCloud or app-specific passwords

• For iCloud accounts that use app-specific passwords, entering the app-specific password directly in Outlook’s own interface (not via Apple sign-in pages) can resolve sign-in failures.
• If the app-specific password was recently changed or revoked, generate a new one and enter it directly in Outlook.

If these checks do not resolve the issue, the next step is to contact the email service provider or organization’s IT administrator with the exact error and confirm the correct server settings, credentials, and any SSL/certificate requirements.

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References:

• NoSuchAccountException: Login Error
• Why do I get the error "Please check your email, password, and server and try again"?
• Error: IMAP Autodiscover Failed
• [Exchange] Why do I get the message "The connection to your mail server timed out, please check your mail settings"?
• Error: IMAP Secure Connection Not Available
• Error: Invalid IMAP Server Info
• Error message: Your mail server certificate is invalid. Please contact your system administrator.
• Error: SMTP SSL Check Failed
• Outlook issue with App Specific Password and iCloud - Microsoft Q&A