SCCM discovery methods help you to find different devices on your network. It also lets you find devices and users from Active Directory, or users from Azure Active Directory (Azure AD).
After you install Configuration Manager, you must enable and configure discovery methods to find your resources in your setup.
1. Active Directory Forest Discovery
2. Active Directory Group Discovery
3. Active Directory System Discovery
4. Active Directory User Discovery
5. HeartBeat Discovery
6. Network Discovery