What is exchange server?

Microsoft Exchange Server is the server side of a client–server, collaborative application product developed by Microsoft. It is part of the Microsoft Servers line of server products and is used by enterprises using Microsoft infrastructure products. Exchange's major features consist of electronic mail, calendaring, contacts and tasks; support for mobile and web-based access to information; and support for data storage.

Microsoft Exchange Server is the brand name for Microsoft's email server software and is typically found in corporations running Microsoft Windows Server. In addition to email Exchange Servers also provide centralized company address books, shared calendars and web browser access. For more information see the Microsoft Exchange Server product page.

Exchange Server backup: How to backup Exchange Server?

Exchange backup software

SQL backup software