We do this using the “appsettings.json” file. To talk to the correct app registration on Azure we need to configure what the app will connect too.

So install “” before moving to the next step. For this Authentication we only need the one package. Once you have created the project you need to install the necessary Nuget packages. Like in the picture.Ĭreate a new ASP.NET Core Web project called “SampleAuth” and when you get to choose what type of API you want select API.

Make sure to add 2 URLs into the new platform you created, one with the /signin-oidc and another without it just the localhost URL.

If your API is running on your URL you add should be:.

When you click on the web application you will need to give a redirect URL to your API.

You will need to add a new platform and add a web application.

Go to the Authentication tab on the left-hand side.

When entering details into appsettings.json.

On the overview page you will see your ClientId and TenantId.

Create a new App Registration and fill in the details required.

IIS (Internet Information Services) installed.

Basic Understanding of C#, JavaScript, ASP.NET Core Web API.

Should you wish to view my GitHub to see the full code, follow this link: In this article you will learn how to sign into a office 365 account on your frontend using an ASP.NET Core Web API.

My reason for writing this article was when I was developing on my own for work I needed to learn this stuff however there wasn't a good guide that was super simple out there so I wrote my own for others in the future!

Office365log in