Lite agent on MS SQL servers

What Sophos products to install.

MS Servers (Physical or Virtual ) - Sophos Endpoint + Lite Agent
MS SQL Servers (Physical or Virtual) - Lite Agent only?
VDI Desktops (Full or Image based) - Sophos Endpoint + Lite Agent

I know at one time SQL servers we were told only the LIte AGent can be installed. Is this still true ? I am not able to find supporting document of lite agent