When you start to install System Center Data Protection Manager (DPM) you are pointed to a missing Single Instance Store (SIS) as a pre-requisit. But there is no hint or link for the administrator how to enable this. No role or feature available to activate SIS.
But you only need to execute following comand:
start /wait ocsetup.exe SIS-Limited /quiet /norestart
and SIS is enabled. But don’t wait for a note that it was successful. It just will execute by this piece of software, that’s it…