To run the completed project in this folder, you need the following:

• Java SE Development Kit (JDK) and Gradle installed on your development machine. (Note: This tutorial was written with OpenJDK version 17.0.2 and Gradle 7.4.2. The steps in this guide may work with other versions, but that has not been tested.)
• Either a personal Microsoft account with a mailbox on Outlook.com, or a Microsoft work or school account. If you don't have a Microsoft account, there are a couple of options to get a free account:
  • You can sign up for a new personal Microsoft account.
  • You can sign up for the Microsoft 365 Developer Program to get a free Microsoft 365 subscription.

You can register an application using the Azure Active Directory admin center, or by using the Microsoft Graph PowerShell SDK.

1. Open a browser and navigate to the Azure Active Directory admin center and login using a personal account (aka: Microsoft Account) or Work or School Account.

2. Select Azure Active Directory in the left-hand navigation, then select App registrations under Manage.

3. Select New registration. Enter a name for your application, for example, Java Graph Tutorial.

4. Set Supported account types as desired. The options are:

   Option	Who can sign in?
   Accounts in this organizational directory only	Only users in your Microsoft 365 organization
   Accounts in any organizational directory	Users in any Microsoft 365 organization (work or school accounts)
   Accounts in any organizational directory ... and personal Microsoft accounts	Users in any Microsoft 365 organization (work or school accounts) and personal Microsoft accounts

5. Leave Redirect URI empty.

6. Select Register. On the application's Overview page, copy the value of the Application (client) ID and save it, you will need it in the next step. If you chose Accounts in this organizational directory only for Supported account types, also copy the Directory (tenant) ID and save it.

7. Select Authentication under Manage. Locate the Advanced settings section and change the Allow public client flows toggle to Yes, then choose Save.

To use PowerShell, you'll need the Microsoft Graph PowerShell SDK. If you do not have it, see Install the Microsoft Graph PowerShell SDK for installation instructions.

1. Open PowerShell and run the RegisterAppForUserAuth.ps1 file with the following command, replacing <audience-value> with the desired value (see table below).

   Note: The RegisterAppForUserAuth.ps1 script requires a work/school account with the Application administrator, Cloud application administrator, or Global administrator role.

   .\RegisterAppForUserAuth.ps1 -AppName "Java Graph Tutorial" -SignInAudience <audience-value>

   SignInAudience value	Who can sign in?
   AzureADMyOrg	Only users in your Microsoft 365 organization
   AzureADMultipleOrgs	Users in any Microsoft 365 organization (work or school accounts)
   AzureADandPersonalMicrosoftAccount	Users in any Microsoft 365 organization (work or school accounts) and personal Microsoft accounts
   PersonalMicrosoftAccount	Only personal Microsoft accounts

2. Copy the Client ID and Auth tenant values from the script output. You will need these values in the next step.

   SUCCESS
   Client ID: 2fb1652f-a9a0-4db9-b220-b224b8d9d38b
   Auth tenant: common

1. Rename oAuth.properties.example to oauth.Properties and update the values according to the following table.

   Setting	Value
   app.clientId	The client ID of your app registration
   app.tenantId	If you chose the option to only allow users in your organization to sign in, change this value to your tenant ID. Otherwise leave as common.

In your command-line interface (CLI), navigate to the project directory and run the following command.

./gradlew --console plain run