I was aiding a co-worker with some profile management stuff in a PoC he was doing on Windows 10 and Server 2016. Pointed him out to Workplace and Profiles. He got going with it implemented everything and came back to me with the remark that everything works, but they have a second state key in the registry that has a backup tack between brackets (see picture)
As you can see there is a State [Backup] entry existant in the registry, this also needs to be set to the correct value.
So I added some code to my executable, which is now downloadable in the download section