Upgrade to Windows 10 1703 and RSAT Disappears
An upgrade to Windows 10 build 1703 (“creators update”) removes Remote Server Administration Tools (RSAT). This is unexpected behavior.
As others have stated you can install RSAT that came out for Windows build 1607 and be fine. Though some have reported problems with this, I can say that our teams reported no problems with downloading the older version of RSAT on Windows 1703.
Here is the download for RSAT for Windows 10 from Microsoft.