Get Azure AD app-only access token using certificate on .NET Core
Get Azure AD app-only access token using certificate on .NET Core Communicating with SharePoint Online using an app-only access token is invaluable when building non-interactive applications. Here is how you can get an Azure AD app-only access token in .NET Core. SharePoint Online authentication protocols When building solutions for SharePoint, before you are allowed to communicate with SharePoint your application must authenticate with SharePoint. SharePoint Online supports two kinds of authentication protocols: one based on ACS, traditionally used by SharePoint add-ins, and one based on Azure Active Directory (AAD). The main difference between the two protocols is that the ACS-based protocol is specific to SharePoint and offers you access only to SharePoint APIs. On the other hand using the AAD-based protocol you can access resources from all Office 365, given your application has sufficient permissions. As a result, using the AAD-based authentication you can build more powerful solu...