Microsoft 365 Mail

Microsoft 365 Mail

Microsoft 365 Mail is a central email service for all staff members.

Available to


Service Charge and Application

Staff: Free; no application required
Project / Department: Apply the service through project / department account application

Access to Service

CUHK Microsoft 365 Portal:
Login ID: Your email address
Password: OnePass (CWEM) Password

Service Availability

24 X 7 ; except maintenance period


1. Mailbox & Email Address

Email Address:

Mailbox Size: 50 – 100GB
Size Restriction on each Message (including attachments): 25MB
Mailbox Valid until: 1 working day after staff appointment end date / project account expiry date

2. Using Microsoft 365 Mail via Your Device
3. 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.