Microsoft Teams webhook

To set it up a Teams webhook, you need to:

In Microsoft Teams, choose More options (⋯) next to the channel name and then choose Connectors.
Scroll through the list of Connectors to Incoming Webhook, and choose Add.
Enter a name for the webhook, upload an image to associate with data from the webhook, and choose Create.
Copy the webhook to the clipboard and save it. You'll need the webhook URL for sending information to Microsoft Teams.
Choose Done.

Now in APImetrics:

Go to Alerts & Webhooks:
Create a new webhook, selecting Microsoft Teams as the type and enter the URL you just generated in the API URI box.
Select the Trigger Alerts for your desired outcomes - usually Slow, Warning, and Fail
Press Save