To grant API permissions in SharePoint Admin, you need to go through the Microsoft 365 Admin Center or SharePoint Admin Center, depending on your specific needs. Here are the steps to grant API permissions in SharePoint:

Step-by-Step Guide to Grant API Permissions in SharePoint Admin

1. Sign in to Microsoft 365 Admin Center:

   • Go to admin.microsoft.com and sign in with your admin account.

2. Navigate to Azure Active Directory (AAD):

   • In the left-hand navigation pane, select Admin centers > Azure Active Directory.

3. Register an Application:

   • In Azure Active Directory, go to App registrations and click on New registration.
   • Provide a name for your application, select the supported account types, and enter redirect URIs if needed.
   • Click Register to create the application.

4. Configure API Permissions:

   • Once the app is registered, go to the API permissions section under the application's settings.
   • Click Add a permission.
   • Select Microsoft APIs and then choose SharePoint.
   • Choose the type of permission you need (Delegated or Application permissions) based on your use case.
     • Delegated permissions: Used when the API is accessed on behalf of a signed-in user.
     • Application permissions: Used when the API is accessed by a service or daemon app without a signed-in user.
   • Select the specific permissions needed and click Add permissions.

5. Grant Admin Consent:

   • After adding the permissions, you will see a Grant admin consent button.
   • Click on it and confirm to grant the permissions you have configured.
   • This step is necessary to allow the app to use the permissions without individual user consent.

6. Assign API Permissions in SharePoint:

   • If you’re working with SharePoint Online specifically, you might need to configure permissions using the SharePoint Admin Center.
   • Go to the SharePoint Admin Center > API Access.
   • Here, you can review requests for API permissions and approve them as needed.

7. Review and Save:

   • Ensure all permissions are correctly set up and save your changes.

By following these steps, you should be able to grant the necessary API permissions in SharePoint Admin to allow your application or service to interact with SharePoint data as needed. Let me know if you need further details or assistance!