Microsoft Exchange Server
Calendaring and mail server / From Wikipedia, the free encyclopedia
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Microsoft Exchange Server is a mail server and calendaring server developed by Microsoft. It runs exclusively on Windows Server operating systems.
Developer(s) | Microsoft |
---|---|
Initial release | April 2, 1996; 28 years ago (1996-04-02)[1] |
Stable release | 2019 CU14 Apr24HU (15.02.1544.011)[2] (April 23, 2024; 2 months ago (2024-04-23)) [±] |
Operating system | Windows Server |
Platform | x64 |
Type | Collaborative software |
License | Proprietary commercial software |
Website | www |
The first version was called Exchange Server 4.0, to position it as the successor to the related Microsoft Mail 3.5. Exchange initially used the X.400 directory service but switched to Active Directory later. Until version 5.0, it came bundled with an email client called Microsoft Exchange Client. This was discontinued in favor of Microsoft Outlook.
Exchange Server primarily uses a proprietary protocol called MAPI to talk to email clients, but subsequently added support for POP3, IMAP, and EAS. The standard SMTP protocol is used to communicate to other Internet mail servers.
Exchange Server is licensed both as on-premises software and software as a service (SaaS). In the on-premises form, customers purchase client access licenses (CALs); as SaaS, Microsoft charges a monthly service fee instead.