Q: Where are the Remote Server Administration Tools (RSAT) for Windows 8.1?

A: RSAT for Windows 8.1enables remote management of Windows Server 2012 R2 and Windows Server 2012. RSAT is available at the Microsoft download site.

Note that there is no RSAT for pre-Windows 8.1 to manage Windows Server 2012 R2. This is standard for the RSAT, which is always available only for the equivalent client version of the server version.