Supported Configurations for Configuration Manager

Central administration site	A central administration site can support up to 25 child primary sites.Configuration Manager supports up to 400,000 clients per hierarchy when you use the default settings for all Configuration Manager features
Primary site	Each primary site can support up to 250 secondary sites.A stand-alone primary site always supports up to 100,000 clients
Management point	Each primary site management point can support up to 25,000 computer clients
Distribution point	Individually, each primary site supports up to 250 distribution points and each distribution point can support up to 4,000 clients
Software update point	A software update point that is installed on the site server can support up to 25,000 clients
Fallback status point	Each primary site supports one fallback status point.Each fallback status point can support up to 100,000 clients.