This article was previously published under Q191014
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This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.
Service packs are the means by which Exchange Server 5.5 bug fixes are distributed. Service packs keep the product current. Service packs include updates, system administration tools, drivers, and additional components. All are conveniently bundled for easy downloading. Service packs are cumulative; each new service pack contains all the fixes that are in previous service packs, as well as any new fixes. You do not need to install a previous service pack before you install the latest one.
Exchange Server 5.5 Service Pack 4
Release Date: November 7, 2000
How to Obtain
SP4 is available at the following Microsoft Web site: