Dear colleagues, 

We would like to inform you about some of the important upcoming Microsoft Apps and Services Retirements. 

Upcoming Microsoft Apps and Services Retirements 

Several Microsoft 365 apps, services, and operating systems will reach end of support in 2025. 

• • Microsoft 365 Apps on Windows 10 

Support ends October 14, 2025, alongside Windows 10. Upgrade to Windows 11 to stay supported.  

• • Office 2016, Office 2019, and Additional Apps 

Support ends October 14, 2025. Transition to Microsoft 365 for ongoing updates and security.  

• • Legacy Microsoft Outlook for Mac 

Support ends October 2025. Switch to the new Outlook for Mac to maintain full functionality.  

• • 32-bit Microsoft 365 Apps on Windows Arm PCs 

Feature updates end October 2025; security updates end December 2026. Upgrade to 64-bit for continued support.  

• • Teams Classic 

Teams Classic will no longer be available after July 1, 2025. Users should move to the new Teams experience for uninterrupted collaboration and access to the latest features.  

If you have any questions or concerns, please submit a ticket to the Enterprise Service Centre at (https://uoft.me/m365help). 

Kind regards,  

Enterprise Applications & Solutions Integration (EASI)
Information Technology Services, University of Toronto
215 Huron Street, Toronto
Ontario M5S 1A