Most probably, you will have old Windows ADK version 8.1 running for SCCM 2012 R2.
Disable SQL Replication and Maintenance tasks before you start upgrade operation. SQL Server 2008 R2 SP3: Standard, Enterprise, Datacenter are not supported for 1702. Your database version of your database should be supported by 1702. After the upgrade of a central administration site is completed, you can upgrade child primary sites. It could be either a central administration site or a stand-alone primary site. Upgrade should start from top-level site of the hierarchy. BTW, why you should upgrade to 1702 is compiled here:īefore you start upgrading, there are few consideration which need to be taken care of: In this post we will see how to upgrade from SCCM 2012 R2 to 1702 which was not possible some time ago as its baseline media was not available.But here is good news, now 1702 baseline media is available so upgrade is possible. They call it “ Current Branch” model which they first introduced in SCCM 1511 (in YYMM format). 
You all know that Microsoft has changed the way new features were introduced in SCCM. Hope this post finds you in good health and spirit.
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