@Link Email

Students can use @Link, an email service under CUHK Microsoft 365, to stay connect with the University. With opt-in procedures done, you can even use it after your graduation.

Available to

Students, student organizations, projects & alumni who graduates with CUHK University Degree or above qualifications, including Postgraduate Diploma in Education Programs (PGDE)

Service Charge and Application

Students: Free; no application required
Alumni: Free; opt-in procedures required
Student Organizations / Projects: Apply the service through student organization / project accounts application

Access to Service

CUHK Microsoft 365 Portal: http://www.cuhk.edu.hk/o365
Login ID: Student-ID@link.cuhk.edu.hk / Alumni-ID@link.cuhk.edu.hk /  Computing-ID@link.cuhk.edu.hk (for project accounts only)
Password: OnePass (CWEM) Password

Service Availability

24 X 7 ; except maintenance period


1. Email Address & Mailbox Setting

Default Email Address: Student-ID@link.cuhk.edu.hk
Another Email Address: 

Mailbox Size:

  • 100GB for students
  • 50 GB for alumni / student organization / projects

Size Restriction on each Message (including attachments): 25MB
Mailbox Valid until: student account expiry + 30 days, except optted-in for alumni lifelong email service


2. Using @Link via Your Device
3. Opting in @Link for Alumni

Graduates can opt in to use @Link email (50GB)OneDrive for Business, the related collaboration tools and the files stored inside after graduation. ITSC supports the opt-in process while Alumni Affairs Office supports the service for alumni.

Note to Graduauds: Your mailbox and OneDrive files could be kept only if you opt in the service before graduation

Opt in Procedures

Before Graduation:

  • Opt-in Guide – 
  • Students who become CUHK alumni in 90 days
    • Can complete the opt in procedures before graduation in order to retain the emails and files in OneDrive for Business
    • Must have alias for @Link defined to complete the opt-in


After Graduation:

  • Opt-in Guide –


4. (For Student Organizations) Switchover Exercise from CUHK Webmail to @Link in Year 2017

ITSC had coordinated and communicated with the student organization account users in 2017 to prepare for the switchover from the old email email, CUHK Webmail, to @Link. The switchover exercise included

  1. An @Link mailbox was offered to the student organization with other cloud services e.g. OneDrive, and collaborative tools available for students.
  2. A new email address = alias@link.cuhk.edu.hk (if defined) / computing-id@link.cuhk.edu.hk was created, which was also the reply-to email address / sender email address.
  3. Student organizations could use computing-id@link.cuhk.edu.hk & OnePass password to log in @Link mailbox.
  4. If student organization had defined email address as alias@cuhk.edu.hk which was published in different publications, to avoid email loss, any new emails reaching that email address would be forwarded to @Link. However, in a long term, those student organization should publish their new email address alias@link.cuhk.edu.hk instead.
  5. If student organization had never defined its email address i.e. email address = computing-id@cuhk.edu.hk, it became invalid on 3 Jan 2018.


5. FAQs

Questions below have been frequently asked:

  • Mail Size, Receiving/Sending Limit and General settings?
  • Mail Folders, Suspected Mail Lost and Blocked attachments in Outlook?
  • Forwarding and Auto-Reply settings?…And more

Please click here for the full version of FAQs.