Microsoft had sold a number of simpler email products before, but the first release of Exchange (Exchange Server 4.0 in April 1996 ) was an entirely new X.400-based client–server groupware system with a single data… See more

Exchange Server Enterprise Edition supports clustering of up to 4 nodes when using Windows 2000 Server, and up to 8 nodes with Windows Server 2003. Exchange Server 2003 also introduced active-activ… See more

Like Windows Server products, Exchange Server requires client access licenses, which are different from Windows CALs. Corporate license agreements, such as the Enterprise Agreement, or EA, include Exchange … See more

Microsoft Exchange Server uses a proprietary remote procedure call (RPC) protocol called MAPI/RPC, which was designed to be used by Microsoft Outlook. Clients capable of using the proprietary features of … See more

The complexities of managing Exchange Server—namely running both one or more Exchange Servers, plus Active Directory synchronization servers—make it attractive for organisations to purchase it as a hosted service. … See more

In February 2020, an ASP.NET vulnerability was discovered and exploited relying on a default setting allowing attackers to run arbitrary code with system privileges, only requiring a connection to the server as well as being lo… See more