The company's Client division produces the flagship Windows OS line such as Windows 7; it also produces the Windows Live family of products and services. Server and Tools produces the server versions of Windows, such as Windows Server 2008 R2 as well as a set of development tools called Microsoft Visual Studio, Microsoft Silverlight, a web application framework, and Systems Management Server, a collection of tools providing remote-control abilities, patch management, software distribution and a hardware/software inventory. Other server products include: Microsoft SQL Server, a relational database management system, Microsoft Exchange Server, for certain business-oriented e-mail and scheduling features, Small Business Server, for messaging and other small business-oriented features; and Microsoft BizTalk Server, for business process management.

Microsoft provides IT consulting ("Microsoft Consulting Services") and produces a set of certification programs handled by the Server and Tools division designed to recognize individuals who have a minimal set of proficiencies in a specific role; this includes developers ("Microsoft Certified Solution Developer"), system/network analysts ("Microsoft Certified Systems Engineer"), trainers ("Microsoft Certified Trainers") and administrators ("Microsoft Certified Systems Administrator" and "Microsoft Certified Database Administrator"). Microsoft Press, which publishes books, is also managed by the division. The Online Services Business division handles the online service MSN and the search engine Bing. As of December 2009, the company also possesses an 18% ownership of the cable news channel MSNBC without any editorial control; however, the division develops the channel's website, msnbc.com, in a joint venture with the channel's co-owner, NBC Universal.