@Link Email

@Link Email

Students can use @Link, an email service under CUHK Office 365, to stay connect with the University. With opt-in procedures done, you can even use it after your graduation. It provides a 50 GB mailbox accessible across your devices.

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 Office 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

To send emails via Gmail, check Using Office 365 Mail via Your Device / Other Email Service for a correct setting. Otherwise, mails sent from you might be classified as Junk.

Service Availability

24 X 7 ; except maintenance period


1. Email Address & Mailbox Setting

Mailbox Default Setting

Default Email Address: Student-ID@link.cuhk.edu.hk
Mailbox Size: 50GB
Size Restriction on each Message: 20MB
Mailbox Validity: For students, it depends on student account expiry date.

Define Another Email Address with Alias for @Link

With alias for @Link, you can define another @Link e-mail address. It will be

  • an unchangeable email address on top of your default e-mail address Student-ID@link.cuhk.edu.hk;
  • shown at the “From” field while others receive emails sent from your @Link.

Define alias for @Link at http://cai.itsc.cuhk.edu.hk/alias/ OR by mouse-over “I want to” on the top bar and clicking “Define email address” (via campus network / CUHK VPN) – How to define?


2. Using @Link via Your Device / Other Email Service

You can enjoy @Link service through

Clients / Usage General Users DUO 2FA Enabled Users
Web Browser (http://www.cuhk.edu.hk/0365) Outlook Web Access (OWA)
Change Display Language / Time Zone
Outlook Web Access (OWA)
Change Display Language / Time Zone
Windows Outlook 2016 Outlook 2016
MacOS Native Mail App
Outlook 2016
Native Mail App
Outlook 2016
iOS Native Mail App
Outlook 2016
Native Mail App
Outlook 2016
Android Native Mail App
Outlook 2016
Outlook 2016
Gmail Sending Emails via Gmail Not Applicable
Other Email Clients Auto Setup by Choosing Exchange / Office 365 OR Manual Setup though IMAP Not Applicable



If you are using other connection methods, please use the settings below to access @Link.

Incoming Mail
Connection Method: IMAP
Server Name: outlook.office365.com
Port: 993
Encryption Method: SSL

Outgoing Mail
Connection Method: SMTP
Server Name: smtp.office365.com
Port: 587 (Please go to More Setting > the Tab Outgoing Server > Check My outgoing server (SMTP) requires authentication – Use same settings as my incoming mail server) or
Encryption Method: TLS


3. Opting in @Link for Alumni

Graduates can opt in to use @Link emailOneDrive for Business, the related collaboration tools and the files stored inside after graduation. ITSC is supporting the opt-in process while Alumni Affairs Office is supporting the service for alumni.

Opt in Procedures

As a Student in MyCUHK

One must complete the opt in procedures before graduation in order to retain the emails and files in OneDrive for Business. The procedures below are eligible to students who will become CUHK alumni within 90 days (i.e. no other concurrent study program in CUHK) with alias for @Link defined (via Campus Network / CUHK VPN).

  1. Define alias for @Link
  2. Go to MyCUHK >> CUSIS and MyStudy
  3. Click Life-Long Email Service Opt-In
  4. Read the terms of use and submit your application
  5. Your opt in result will be shown on screen

Click here for the step-by-step guide.


As an Alumni in MyCUHK

  1. Go to MyCUHK >> MyPage
  2. Click Life-Long Email Service Opt-In
  3. Read the instructions and terms of use
  4. Submit your application and your opt in result will be shown on screen

Click here for the step-by-step 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.