I recently needed to add multi-language clients that I had missed during the initial install of ConfigMgr 2012 R2 SP1. Typically this is accomplished through site maintenance of the setup wizard. New with the ConfigMgr 2012 R2 SP1 install is to first install ConfigMgr “RTM” SP2, then update the server with the lightweight R2 SP1 bits.
But when I ran the setup from the original ConfigMgr 2012 SP2 media, the only options available were to recover a site or uninstall the site. The option to perform site maintenance was grayed out (see image below)!
Fortunately there was an easy workaround. Instead of running setup from the media, instead run it from the current ConfigMgr installation directory, under \bin\X64\. Optionally, run Configuration Manager Setup from the program files menu. Then voila, the option was available!