Microsoft Exchange 5.5

Exchange is a proprietary e-mail and groupware server software from Microsoft for Windows Server. The first version publicly sold was Exchange Server 4.0. The number 4.0 was used as it was a replacement for Microsoft Mail 3.x. At release, unlike other desktop/lan e-mail solutions it featured client/server communications rather than using file sharing, used a powerful messaging protocol, and stored all message and address book information in a database. It eventually evolved to include scheduling and many other functions. The Exchange Client (later Microsoft Outlook) supported rich text formatting, and the ability to create such things as e-mail forms.

Release notes

Exchange 5.5 changes from the use of the Exchange e-mail client to Microsoft Outlook.

Installation instructions

This key should work: 419-0015701

Product type
Application Chat PIM Server
Release date
User interface
Download count
17 (11 for release)


Download name Version Language Architecture File size Downloads
Microsoft Exchange Server 5.5 Enterprise Edition (ISO) 5.5 Enterprise Edition English 77.14MB 6
Microsoft Exchange Server 5.5 Service Pack 3 (ISO) 5.5 Service Pack 3 English 168.72MB 1
Microsoft Exchange Server 5.5 Service Pack 4 5.5 Service Pack 4 English 15.67MB 1
Microsoft Exchange Server 5.5 Service Pack 4 Rollup 5.5 Service Pack 4 Rollup English 1.95MB 3


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