OAuth2

The attached open source C# .NET library is an SMTP client implementing implicit SSL and OAuth2 protocols. The library answers the question: how to send email message using Gmail as a server. Or, how to send email message using email server that implements implicit SSL and port 465.

Use a JWTToken to access a .NET Core Web API leveraging IdentityServer4 / OAuth2.

How to generate Jwt security token for Application pool identity or logged on user using OAuth 2 from ADFS

Integrate Google OAuth 2.0 with ASP.NET in C# for seamless user authentication

Integrate Google OAuth 2.0 with ASP.NET in C# for seamless user authentication

Oauth2 Client with IdentityModel.AspNetCore

Step-by-step approach to configure popular development tool Postman to test/execute Infor ION API

It all started with an email sent to a daemon.  A windows service hosting two modules, each of which monitors an inbox for automation, dutifully ignored warnings from IT that basic authentication for O365 would be switched off in several months. This is how we solved it.