Article ID: 234805 - View products that this article applies to.
This article was previously published under Q234805
For reasons of scalability, performance, and security, you can install Outlook Web Access (OWA) on a server that is not running Microsoft Exchange Server. The following article describes how to install OWA in this configuration.
Before you install Outlook Web Access, ensure that Microsoft Internet Information Server (IIS) and Active Server Pages are installed on your Windows NT Server. Exchange Server 5.5 can be used with either IIS 4.0 or IIS 3.0; Exchange Server 5.5 SP3 is required for proper Exchange 5.5 Server operation on Windows 2000 Servers, so its OWA components are needed with IIS 5.0.
NOTE: To sucessfully install OWA components from Exchange Server 5.5, install Windows NT 4.0 Service Pack 3 with hotfixes or upgrade your computer to Windows NT 4.0 Server SP4. For additional information, click the article number below to view the article in the Microsoft Knowledge Base:
179796NOTE: You do not have to install Windows NT 4.0 SP3 to install Active Server Pages from the SP3 CD.
(http://support.microsoft.com/kb/179796/EN-US/ )Setup Error Installing Exchange 5.5 OWA Components
After Setup is finished, users can log on to their mailbox by using OWA, and the requests will be forwarded to the Exchange Server computer appropriately.