
Interaction between Exchange 2000 OWA multimedia extensions and Office 2000 HTML Source Edit causes this behavior. If you install the multimedia extensions for OWA, and you did not install HTML Source Edit as an option when you installed Office 2000, the first time you use OWA, the Office 2000 installer program starts and asks you to insert the Office 2000 CD-ROM.
To resolve this issue, point the Windows installer to the Office 2000 installation point, and the necessary files are then copied to your system. If you click Cancel to close the installer, OWA and Office 2000 function correctly.