After the extension have been retrieved by your Solibri administrator you can install it in Solibri Office. For a detailed description on how to install extensions in Solibri Office please refer to https://help.solibri.com/hc/en-us/articles/7106962890007-Installing-and-Using-an-Extension-in-Solibri-Office
After installing the dRofus extension, Solibri Office needs to be restarted