Why can’t I install a SP1 CU3 Site Server on Windows Server 2012 R2?
Despite Cumulative Update 3 (CU3), for ConfigMgr 2012 Service Pack 1 providing support for installing the Site Database Server on a computer running Windows Server 2012 R2 Standard or Datacenter Editions, this support does not extend to installing either a Site Server or the SMS Provider on a computer running this operating system.
For ConfigMgr 2012 SP1 the Windows Assessment and Deployment Kit (Windows ADK), version 8.0 is a prerequisite that has to be installed on a computer that is either going to be a Site Server and/ or hosting an instance of the SMS Provider.
As Windows Server 2012 R2 does not support the Windows ADK it’s therefore fundamentally at an Operating System level unsupported to install either a SP1 Site Server or the SMS Provider (even CU 3), on a computer running Windows Server 2012 R2.
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