To integrate with Microsoft Intune, Certificate Enrollment Gateway requires the following Microsoft Intune information.
- Application (client) ID. For example: - 00000000- -- 0000- -- 0000- -- 0000- -- 000000000000
- Tenant ID. 
 The Tenant ID is the domain text after the @ sign in to your account. For example, if your account isadmin@test.example.com, then your tenant ID istest.example.com.
- Application Key (Authentication Key), if you generated a client secret in Microsoft Intune. The application key is the client secret you generated earlier. For example: - abcdefghijklmnopqrstuvwxyz123456- If you will use certificate-based authentication, you do not need an application key. 
You may have already obtained and recorded this information when you configured Microsoft Intune for Certificate Enrollment Gateway.