Issue: Teams add-in has disappeared in the Outlook App, when scheduling a meeting from the Calendar.
Reason: Outlook sometimes disables add-ins in order to optimize the load time for the application.
Solution: Enable the Teams Add-In for Outlook.
Method 1: Locate "Slow and Disabled Add-ins"
- File
- Click "Manage COM Add-Ins"
- Expand "Options", and then enable the Add-in.
- If this doesn't work, try method 2.


Method 2:
- File
- Click: "Options"
- Go to: "Add-ins"
- Under "Manage:", select: "Disabled Items"
- Teams will appear under Disabled Items. Select it, and then click "Enable"
