Collaboration Data Object library

This library is installed either with Microsoft Outlook or Microsoft Exchange Administrator.
Depending on the Outlook version you install, CDO component is installed by default or not.
CDO is not installed with Microsoft Exchange Administrator 5.5. You must apply the Exchange Service Pack 1 or later for the library to be installed.

Internet Explorer 4.01 SP2 or later

You can download Internet Explorer service packs at http://support.microsoft.com/default.aspx?scid=FH;[LN];sp&

ADSI 2.5

ADSI is already installed with Windows 2000, XP & 2003. You should not install it under this OS.
You need to install the library under Windows 9x or Windows NT.
You can download ADSI from http://www.microsoft.com/ntserver/nts/downloads/other/ADSI25/default.asp

MDAC 2.8

You will find information and links to download at http://www.microsoft.com/downloads/details.aspx?FamilyID=6c050fe3-c795-4b7d-b037-185d0506396c&DisplayLang=en

Active Directory Client

According to Technet article Q275917: ADSI 2.5 and MDAC 2.x Compatibility issues, in some cases you need to install the Directory Services Client to ensure a proper directory access.
If EvA experiences problems to access MS Exchange director, you will need to install it.
Active Directory Client for Windows 95 and Windows 98 package is included on the Windows 2000 CD-ROM in the Clients\Win9x\Dsclient.exe file.
You will find Active Directory Client for NT 4.0 at http://www.microsoft.com/windows2000/server/evaluation/news/bulletins/adextension.asp