Web Login to on Microsoft 365 (M365)

  1. Login from University Email Services Website

    Click the “M365 Sign-in Page” button from the University Email Services page ( or, at the CityU Authentication System, please enter your CityU EID and password to login.

  1. Login from Microsoft

    At, type in You will then be redirected to the CityU Authentication System. Enter your EID and password to login.

You are strongly recommended to use a web browser with latest version listed below:

- Google Chrome
- Firefox
- Microsoft Edge
- Safari

For enquiries, please contact IT Service Desk at +852 3442-8340 or email to

You can click this link to go to the Staff M365 Sign-in Page now:

The use of the above Email services is governed by the University's "Policies on Use of IT Services & Resources".