This product is only the add-on CALs for adding Users or Devices to an existing system. No software or disks are included.
 
Microsoft Small Business Server 2008 is designed and priced especially for small businesses, so you can improve productivity and help protect your vital business information. Windows Small Business Server 2008 helps protect your vital business information from loss, by backing up the data on your network and helping enable you to recover accidentally deleted files. Windows Small Business Server 2008 gives you highly secure access to business contacts, calendars, e-mail, files, and other important desktop resources from any Internet-connected computer, virtually anywhere at any time, so you can be productive while you’re away from the office or on the road.
 
This product includes 20 User Client Access Licenses (CALs).