.NET Core Razor Pages with Microsoft Graph

1. Ensure you have .NET 5+ installed on your machine. You can download and install it from the following link:

   https://dot.net

2. Create a Microsoft 365 developer tenant if you don't already have one:

   https://developer.microsoft.com/en-us/microsoft-365/dev-program

   You can view a video that covers key tips here:

   https://www.youtube.com/watch?v=DhhpJ1UjbJ0

3. Register a new app in Azure Active Directory:

   • Login to the Azure Portal.

   • Select Azure Active Directory.

   • Select App registrations in the Manage section.

   • Select New registration in the toolbar.

   • Give the app a name.

   • Select Accounts in any organizational directory (Any Azure AD directory - Multitenant) and personal Microsoft accounts (e.g. Skype, Xbox) in the Supported account types.

   • In the Redirect URI section select Web and enter the following URL:

     https://localhost:5001

   • After the app registration is created, note the clientId value shown (you'll use it later) .

   • Click the Authentication option on the left.

   • Add the following URL into the Web section's Redirect URIs:

     https://localhost:5001/signin-oidc

   • Check the ID tokens checkbox.

   • Save your changes.

   • Click Certificates & secrets and create a new client secret. Ensure that you copy and store the secret somewhere since this is the only time you'll be able to access it. You'll need it in the next step.

4. Open a terminal window at the root of the DotnetCoreRazor-MicrosoftGraph folder and run the following commands, substituting YOUR_APP_ID with your Application (client) ID from the Azure portal, and YOUR_APP_SECRET with the application secret you created.

dotnet user-secrets init 
dotnet user-secrets set "AzureAd:ClientId" "YOUR_APP_ID" 
dotnet user-secrets set "AzureAd:ClientSecret" "YOUR_APP_SECRET"

1. Run dotnet restore

2. Run dotnet build

3. Run dotnet run

4. Once the app is running, navigate to https://localhost:5001 and login using one of your Microsoft 365 tenant users.

5. Once you're logged in you should see your user name displayed. Click on the menu items at the top to view the user's email, calendar (you may need to add calendar items for the user), and files.

NOTE: If you get an SSL certificate error, you can generate a dev certificate for your machine using the following command:

dotnet dev-certs https -t