It may happen to you that you need to run a process which has no user interaction for automation purposes. This may be a console application or an Azure Function that has a timer trigger. How is it possible to call the CSOM (client side object model) API of SharePoint online in such fashion? Usually people authenticate in other ways. Today, I want to show you how this can be done, using a .NET Core console application. Preface Before getting cracking with the code, I want to brush on the the On-Behalf-Flow, as it is important to understand it to understand why the code does certain things. The OAuth 2.0 On-Behalf-Of flow (OBO) serves the use case where an application…