Microsoft 365 Mail

Email Address:

• Default email address:
  • Staff – standard staff email address
  • Department / Project – computing-ID@cuhk.edu.hk
• Can be changed at https://cai.itsc.cuhk.edu.hk/alias/ 
• User Guide
  • Guideline of email alias definition (Staff account)
  • Guideline of email alias definition (Department / Project / Student Organization account)

User Profile: You can update your profile information like contact phone, title, address and display name at Update Microsoft 365 Staff Profile
Size Restriction on each Message (including attachments): 25MB
Mailbox Valid until: 1 working day after staff appointment end date / project account expiry date

Here are quick guides for you to check emails or access your mailbox across devices and other email services.

Exchange Online Archive Service:

A new Online Archive mailbox will appear below your primary mailbox.

• Shown as “Online Archive – [Your Email Address]” in Outlook Desktop

• Shown as “In-Place Archive – [Your Name]” in Outlook Web

You can set auto-archive or manual-archive to free up space in your primary mailbox.

For the setup steps, please refer to  What is Exchange Online Archive and how to use?

Auto Removal of Deleted Items

Items in your “Deleted Items” folder that have been there for over 30 days will be automatically removed. This includes emails, contacts, notes, calendar entries, and tasks in Outlook. An “Expires” tag will indicate when they will be removed.

To learn more about these two features, check out our Online Briefings below:

Online Archive and Email Deletion Policy User Briefing (Cantonese session)

Online Archive and Email Deletion Policy User Briefing (English session)

Questions below have been frequently asked:

• The maximum size of each message (including attachments) is 25 MB.
• Blocked file types in email attachment
• Sending Limit for Office 365 Education
• Display Name Standard (for staff accounts only)
• How to recover deleted items or email
• Backup email for task handover