To resolve this issue, you must run Setup again and select the
Microsoft Exchange Messaging and Collaboration Services option.
To complete the installation, follow these steps:
- Insert the Exchange 2000 CD into the CD-ROM drive.
- In the Microsoft Exchange 2000 Enterprise Server dialog box, click Exchange Server Setup.
- In the Microsoft Exchange 2000 Installation Wizard dialog box, click Next.
- In the list of components, make sure that Exchange Messaging and Collaboration Services is selected.
- Follow the on-screen instructions to complete the installation.
NOTE: Setup detects that Exchange Server is already installed on your computer and automatically runs in Custom installation mode.