The below post explains the end to end process of software updates management in SCCM 2012     Pre-requisites:     1.  WSUS Server (WSUS 3.0 SP2 ) should be installed on the SCCM site server or if you want to install WSUS on another server, it is important that you install WSUS administration console as the SCCM Server uses API.   This  link  explains the step by step procedure to install WSUS 3.0 SP2       2. Install SUP-Software Update Point on the SCCM Server .       3. Reporting Services Point:   Install reporting services point role as described in this link .     4. Client agent:  The software update client agent should be enabled(will be enabled by default) and the settings have to specified as per the requirement. On SCCM console, go to Administration>Site Configuration>Client settings>Right click on Default client settings> Click on Properties.       If required, we can create custom client settings and then enable client settings for that settings.      ...
  SCCM 1702 is a baseline version now, we can upgrade directly from below versions:     System Center 2012 Configuration Manager with Service Pack 1  System Center 2012 Configuration Manager with Service Pack 2  System Center 2012 R2 Configuration Manager  System Center 2012 R2 Configuration Manager with Service Pack 1        Prerequisites :   Install ADK 10       General prerequisites will already be met as it is an upgrade.   Note:Perform a backup of the site and disable backup site server and other maintenance tasks.   Following are no longer supported in SCCM 1702   Windows Server 2008/2008R2 except for DPs  SQL Server 2008R2   Supported OS and DB versions:  Microsoft checklist    Installation:   Download SCCM 1702 from Microsoft  site, extract the contents and double click on splash.hta   Click on Install.           Click Next         Select upgrade Configuration site and  Click Next        Choose options appropriately.             Click Next and download prerequisit...