(Caching Server, File Sharing, Time Machine Server)
Does 5.6.3 delete deprecated services? - Apple Support Community macOS Server 5.6.3
It served as a preparation point for the subsequent macOS Mojave-compatible version (5.7.1), which removed the vast majority of server features. The "Deprecated Services" Turning Point (Caching Server, File Sharing, Time Machine Server) Does 5