Hi, @PAVZ
Thank you for posting in Microsoft Q&A forum.
Here is the official documentation of SCCM:
https://learn.microsoft.com/en-us/mem/configmgr/core/understand/introduction
And here is a series of articles (step by step guide) that are perfect for newbies:
https://www.prajwaldesai.com/sccm-2012-r2-step-by-step-guide/
(Please Note: Since the website is not hosted by Microsoft, just for your reference.)
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