Background information:

To improve the security level of Microsoft 365 Email Service, traditional email protocols (e.g POP3, IMAP4 and SMTP) will not be supported starting from 15 Nov 2021.


Please use any of the following Email clients / applications, which supporting Modern Authentication, to continue to access to email service.

Email clients / application with OS versions Support Modern Authentication
Webmail (Outlook Web Access) ✓
MS Outlook 2016 for MacOS 10.14 or later ✓
MacOS 10.14 Mail App or later ✓
MS Outlook 2013 for Windows 10 or later * ✓
Outlook for iOS 11.3.1 or later ✓
Outlook for Android 8.0 or later ✓
Mail for iOS 11.3.1 or later ✓
* Please refer to the following website to enable Modern Authentication for Outlook 2013:
Enable Modern Authentication for Outlook 2013

Will not support following Email clients / applications / protocol and connect to the Email Services after 15 Nov 2021.

Email clients / applications with OS versions Support Modern Authentication
POP3 / IMAP4 / SMTP ✕
MS Outlook 2016 for MacOS 10.14 before version ✕
MacOS 10.14 Mail App before version ✕
MS Outlook 2013 for Windows 10 before version ✕
Outlook for iOS 11.3.1 before version ✕
Outlook for Android 8.0 before version ✕
Mail for iOS 11.3.1 before version ✕

Target:


Advantages:


FAQ:

1. The authentication box prompted when Modern Authentication was enabled. What should I do?
Ans: If your email client supports the Modern Authentication, re-authentication box may be prompted or re-configure may be required. For this case, you may remove the email account from the email client and add it back again.

2. Is Webmail available to use Modern Authentication?
Ans: The Modern Authentication will not affect users who using web browser to access the webmail system.

For any questions about the Modern Authentication, please visit CNA Portal FAQ for details.


Support:


Useful information:

What is modern authentication?