OL2000: Why Outlook 2000 Requires Outlook Express

ID: Q230076

The information in this article applies to:

Microsoft Outlook 2000

SUMMARY

This article describes why Outlook requires the installation of Outlook Express. Microsoft does not support the use of Outlook 2000 without Outlook Expresss installed.

MORE INFORMATION

Outlook shares files with Outlook Express. If you install Outlook with the Internet Mail Only (IMO) option, Outlook will not run without Outlook Express 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 includes the following key components:

Management of Internet Accounts

Use of SMIME

News Reader

For additional information about issues you may encounter if Outlook Express is not installed, please see the following articles in the Microsoft Knowledge Base:

Q195879 OL2000: Installing and Using the Outlook Newsreader

Q212991 OL2000: (IMO) ErrMsg: "Outlook Express 4.01 Required"

Q223473 OL2000: 'Out of memory. Close some windows or programs and...'

Q224876 OL2000: Outlook Fails to Start After MapPoint Is Installed

For additional information about selecting your default mail client, click the article number below to view the article in the Microsoft Knowledge Base:

Q196257 OL2000: How to Change Your Default Mail Client

Additional query words: OL2K

Keywords :
Version : WINDOWS:2000
Platform : WINDOWS
Issue type : kbinfo