There is no difference in the procedure of the installation between Single-User and MultiUser Untis.
You can install Untis either centrally on a (Windows-) server or separately on all workstations on which the program shall be used. Central installations on a server have to be carried out with administrator rights. Start the program once on the server and on all PCs with administrator rights to allow the required entries to be written into the system registry.
Every PC which works with MultiUser (no matter if separate or server installation) must have an ODBC-connection according to the description in the following chapter.