Microsoft KB Archive/255029

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Knowledge Base

OL98: Why Outlook 98 Requires the Installation of Outlook Express

Article ID: 255029

Article Last Modified on 3/25/2000


  • Microsoft Outlook 98 Standard Edition

This article was previously published under Q255029


This article describes why Outlook requires the installation of Outlook Express. Microsoft does not support the use of Outlook 98 without Outlook Express.


Outlook shares files with Outlook Express.

If you install Outlook with the Internet Mail Only (IMO) option, Outlook does not run if Outlook Express is not installed. If you install Outlook with the Corporate or Workgroup (CW) option, Outlook loses much of its functionality. Shared functionality between Outlook and Outlook Express provides the following key functionalities:

  • Internet Accounts management
  • Secure/Multipurpose Internet Mail Extensions (S/MIME) use
  • Newsreader use

For additional information about issues you may encounter if Outlook Express is not installed, click the article number below to view the article in the Microsoft Knowledge Base:

182167 OL98: Installing and Using the Outlook Newsreader

Additional query words: OL2K

Keywords: kbinfo kbfaq KB255029