Apple mail office 365 problems ios 10.10.5

A specific combination of issues!

It sounds like you're experiencing problems with Apple Mail on iOS 10.10.5 when trying to access Office 365 email accounts. Here are some potential solutions to help you troubleshoot and resolve the issues:

Error Messages:

1. "Cannot connect to the server" or "Invalid credentials" - This error usually occurs when the email account settings are incorrect or the server is down.
2. "Authentication failed" - This error might happen when the password is incorrect or the account settings are not configured correctly.

Troubleshooting Steps:

1. Check your Office 365 account settings:
   • Ensure that your Office 365 account is set up correctly on your iOS device.
   • Verify that your email address and password are correct.
   • Make sure that two-factor authentication (2FA) is enabled on your Office 365 account.
2. Reset your Office 365 password:
   • If you're using a password manager, try resetting your password to see if that resolves the issue.
   • If you're still having trouble, contact your Office 365 administrator or Microsoft support for assistance.
3. Check your iOS device's date and time settings:
   • Ensure that your iOS device's date and time settings are correct, as this can affect email account authentication.
4. Disable and re-enable your Office 365 account:
   • Go to Settings > Mail, Contacts, Calendars > [Your Office 365 account] > Account > Delete Account.
   • Wait for a few minutes, then re-add your Office 365 account using the same settings.
5. Check for iOS updates:
   • Ensure that your iOS device is running the latest version (10.10.5 is an older version, so it's recommended to update to the latest version).
6. Reset your Apple Mail settings:
   • Go to Settings > Mail, Contacts, Calendars > [Your Office 365 account] > Account > Reset.
   • This will reset your email account settings to their default values.
7. Contact Apple Support:
   • If none of the above steps resolve the issue, you can contact Apple Support for further assistance.

Additional Tips:

• Make sure that your Office 365 account is set up as an IMAP account, as this is the recommended setting for Apple Mail.
• If you're using a third-party email client, try switching to the built-in Apple Mail app to see if the issue persists.
• If you're still experiencing issues, try resetting your iOS device or seeking assistance from your Office 365 administrator or Microsoft support.

I hope these troubleshooting steps help you resolve the issues with Apple Mail on iOS 10.10.5 and Office 365!