This means the M5Stack is officially certified for use with Microsoft Azure cloud services.
Below is a link to a video demo showing how to connect M5Stack to Azure using Mongoose OS. This video is targeted at Mac users but Mongoose OS can also be used on Windows or Linux.
Details on Mongoose OS: https://mongoose-os.com/
Details on Microsoft - Azure IoT Fundamentals: https://docs.microsoft.com/en-us/azure/iot-fundamentals/