As previously communicated, support for Microsoft Office 2016 and Microsoft Office 2019 ended on October 14, 2025. Looking ahead, support for Microsoft Office LTSC 2021 (Long-Term Servicing Channel) will end next year on
October 13, 2026.

What is changing 

• • Office LTSC 2021: Support ends October 13, 2026.  

• • Using unsupported software means: 

• • • No security updates → increased vulnerability to malware, phishing, exploits. 

• • • No bug fixes or compatibility assurances → potential disruptions in workflows. 

• • • Compliance risks (especially for regulated data) and integration problems with newer services. 

Action required 

• • Review inventory 

• • Plan upgrade: Schedule migration ahead of October 2026 to avoid falling into unsupported status. Options include: 

• • • Move to Microsoft 365 Apps (subscription-based) 

• • • Or upgrade to Office LTSC 2024 if you require a disconnected/one-time purchase model. 

Timeline 

• • October 13, 2026: Projected end of support for Office LTSC 2021.  

Resources 

• • Upgrade guidance and migration resources from Microsoft – Prepare for Office LTSC 2021 End of Support Next Year 

If you have any further 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

Dear colleagues,

Microsoft is changing how certain Power Automate workflows start. If you are a Power Automate user and your workflow begins when it receives a web request or a Teams webhook, you must update the URL that other tools use to call your flow before November 30, 2025.
Flow owners may also see an email titled ‘Your flow has a new trigger URL’ and will see an in-product banner. 

What is changing

Microsoft is updating the trigger URLs used in flows with “When an HTTP request is received” or Microsoft Teams Webhook triggers. 

When you open one of these flows: 

• You’ll see a new trigger URL displayed in the trigger card. 

• A banner will also appear showing the old URL, reminding you to update any systems or services that use it. 

Please update your flows and any connected systems to use the new URL before November 30, 2025. 

After that date, the old URLs will stop working, and any flows still using them will fail to trigger. 

Steps to Update Your Flow 

1. 1. Open your flow in Power Automate that uses either 
      • “When an HTTP request is received”, or 
      • Microsoft Teams Webhook trigger. 
   2. Find the new trigger URL shown in the trigger card. You’ll also see a banner with the old URL — use this as a reminder to update your connections. 
   3. Update all places where the old URL is used, such as app, script, website, Power App, Power Page, or any external system. 
   4. Test your flow after updating to confirm it still triggers correctly. 
   5. If the new URL looks long, make sure the system you’re connecting to supports URLs longer than 255 characters (some older systems may have limits). 

Timeline 

• • Now – November 30, 2025: Both the old and new URLs will work. Please update your links as soon as possible.  

• • After November 30, 2025: Old URLs will stop working, and any flows still using them will fail to trigger. 

Resources 

• • Troubleshoot common issues with triggers (see “Changes to HTTP or Teams Webhook trigger flows”) 

If you have any further 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