Microsoft Betriebssystem / Office » Windows 2012R2 persistant subst Befehl

Research: 32-bit processes understand subst command, 64-bit need something else. Explorer seems to add 64-bit mapping through its interface. Did not find an equivalent in command prompt.
By experiment, I found that Visual Subst utility (free download off the internet) adds 64-bit drive mapping in Windows 2012. In prior OS (Windows 7 etc.), it adds both.

Without 64-bit drive mapping the drives are not visible in Explorer (and other 64-bit apps of course, such as Total Commander etc.)

Without 32-bit drive mapping Visual Studio cannot link anything from Z:, because VS is x86 and the Z: drive is not there to select.
Sometimes it comes up, then on next solution startup it goes away. 95% of the time it won't be there, unless a SUBST command was used.

Workaround: Add 32-bit mappings using SUBST command, then add 64-bit mappings using Explorer or Visual Subst.

Solution: To make persistent SUBST for both 32-bit and 64-bit in Windows Server 2012:
reg add "HKLMSYSTEMCurrentControlSetControlSession ManagerDOS Devices" /v Z: /t REG_SZ /d "??C:MyFolder" /f
Where C:MyFolder is the folder you want to map.