There are several scenarios where you would need to manually install or uninstall the SCCM agent/client, and here’s a quick guide how to do it!

Manual Installation

The SCCM 2012 client is stored on your SCCM server (or additional Management Points) in the Client-folder under SMS_SITECODE (\\SCCMSERVER\SMS_SITECODE\Client\).

You can run the setup using syntax or just simply use the GUI to choose your settings after installation.

If you prefer the scripty way use: ccmsetup.exe /mp:SCCMSERVER /logon SMSSITECODE=AUTO

You can read more about the setup commands at TechNet.