Please note that since I do not personally use Microsoft Teams, this advice is based on general iOS/watchOS system behavior and estimation.
First, verify that your notification settings are properly configured:
1. In the Watch app on your iPhone, go to Notifications > Teams and ensure "Mirror my iPhone" is enabled.
2. Check that notifications for Teams are allowed under iPhone Settings > Notifications > Teams.
3. Within the Microsoft Teams app settings, check the "Integrated calls" option. Depending on how you prefer incoming calls to behave (whether you want them integrated with the iOS phone interface or delivered as standard app notifications), try toggling this setting ON or OFF to see which option works best for your setup.
However, even with all settings configured, third-party VoIP apps (such as Microsoft Teams, WhatsApp, or LINE) frequently face system limitations on watchOS regarding real-time call alerts. Due to background processing restrictions, incoming calls may fail to trigger an active ringing screen on the Apple Watch, resulting only in a missed-call notification after the ringing stops.
If you need a reliable way to be alerted during incoming calls, a common workaround is to search the App Store for terms like "call notification" or "CallNotif" to find a third-party notification helper app. These utility apps operate in the background to send repeated haptic vibrations while a call is actively ringing so you won't miss it.
