PagerTree is an alert service that provides routing to SMS, app push notifications, voice notifications, etc.
I’ve written a new alert transport using Msteams.php as a guide. It is completely functional and PagerTree alert status syncs nicely with LibreNMS alert state changes. I don’t have a dev environment set up yet, but when I do I’ll submit a PR. Until then see below for Pagertree.php if anyone has need.
Edit: PR submitted. See PR for code.