MECM: Microsoft Endpoint Configuration Manager
SCCM: System Center Configuration Manager
MECM (Microsoft Endpoint Configuration Manager) delivers a comprehensive endpoint management solution. MECM offers a range of features and tools for managing devices and applications in large scale environments, including software and patch deployment, complaint management, endpoint protection, conditional access policies, and more. SCCM is now integrated within MECM. SCCM still provides its full device management features, but is incorporated into MECM to include expanded functions, such as endpoint security and analytics.