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Microsoft Endpoint Configuration Manager (MECM)
Formerly known as System Center Configuration Manager (SCCM), MECM is now part of End Point Manager. MECM will remain there and having knowledge of this will definitely useful for you. Find the link of some useful videos / articles which may help you in enhancing your skillset.
Microsoft Endpoint Manager
Intune & Autopilot
Find the good training videos' and article related with Microsoft Endpoint Manager - Intune and Windows Autopilot.
Microsoft Endpoint Configuration Manager (MECM) - OSD
Configuration Manager OSD still widely used for machine build in most of the organizations. You can find the link of few good articles which can help you in understanding specific area of SCCM operating system deployment.
Windows 10 / Desktop Support
Windows 10 Basic Knowledge for Desktop Support Engineers