Based on a number of comments I’ve added a video walkthru for the Azure Client Credentials Auth. Provider I have available on Github. The video is hosted on Youtube and besides a description of the elements used shows pushing the source to Salesforce, configuring the Auth. Provider in Salesforce as well as configuring the App Registration on Microsoft Azure.
See the post for the Auth. Provider (Custom Salesforce Auth. Provider for Microsoft Azure client_credentials flow) for a link to Github.