Connect Microsoft 365 Copilot to your external data in real-time with message extension plugins built with .NET and Visual Studio: Review

This took way more than the advertised hour. The 'Beginner' tag feels like a joke unless a beginner is someone who already has a fully configured Visual Studio setup, an M365 developer tenant, and knows their way around app registrations in Entra ID. Just getting the prerequisites in place was half the battle.

The exercises are basically copy-pasting from a recipe. There's not much learning happening. You follow the steps, a project scaffold appears, you paste in the SSO code, you paste in the API call code, and then you pray the whole chain works. My ngrok tunnel kept failing, which isn't Microsoft's fault, but it's part of the real-world experience of trying to follow this tutorial. I spent more time debugging the local dev server connection to the Teams bot framework than on the actual plugin logic.

I got it working eventually. It does connect to an external API and pull data into a Teams message, which is what it promised. But I can't say I deeply understand the 'why' behind each configuration file or manifest setting. It feels more like I assembled a kit car than learned how to build an engine. At least the code is recent, unlike some other tutorials I've tried. I now have a working example to pick apart, which is something.