The Collaboration Data Objects libraries implement messaging and collaboration functionality in a custom application. This article contains information on where these libraries can  be found.
 
The  information in this article applies to:
  • Collaboration Data Objects (CDO), versions 1.1, 1.2, 1.21
  • Collaboration Data Objects (CDO) for NTS, version 1.2
  • Microsoft Collaboration Data Objects for Windows 2000
The dynamic-link libraries (DLLs) for CDO (1.1, 1.2, 1.21) and CDO Rendering (1.1, 1.2) are MAPI client object libraries. As such, they require MAPI and service providers. For example: The same service providers as Microsoft Exchange Server.
 
Collaboration Data Objects for NTS (CDONTS) is a Simple Mail Transfer Protocol (SMTP) messaging offering, which is part of the overall CDO (1.1, 1.2) library, but is not MAPI dependent.
 
Collaboration Data objects for Windows 2000 (CDOSYS) is a significant improvement in SMTP messaging over CDONTS. CDOSYS provides for rich content through extensive MIME support.
 
The names of these files vary depending on the version of CDO:
 
Version Messaging Library (MSG) Rendering Library (RND) CDO for NTS (NTS) CDO for Windows 2000 (SYS)
1.1 Olemsg32.dll Amhtml.dll Cdonts.dll N/A
1.2 Cdo.dll Cdohtml.dll Cdonts.dll N/A
1.21 Cdo.dll Cdohtml.dll N/A N/A
6.0 N/A N/A N/A Cdosys.dll
 
You can get these files through the following product installations:
 
Note:
  • CDO 1.21 was previously available for download in a redistributable format. However, the redistributable version of the CDO is no longer available. The CDO must be installed by another product, such as Microsoft Outlook or Exchange.
  • Outlook 2000 installation does not include the CDO component by default. You must choose the CDO component during installation.
 
  v1.1 v1.2 v1.21  v6.0
Installation MSG RND NTS MSG RND NTS MSG RND NTS SYS
Outlook 8.00 N N N N N N N N N N
Exchange 5.0 Client Y N N N N N N N N N
Outlook 8.01-8.03 Y N N N N N N N N N
Exchange 5.0 Server Y Y Y N N N N N N N
IIS 4.0 N N Y N N N N N N N
Outlook 98 N N N N N N Y N N N
Exchange 5.5 Server N N N Y Y Y N N N N
Exchange 5.5 Server SP1 N N N N Y Y Y N N N
Exchange 5.5 Server SP2 N N N N Y Y Y N N N
Outlook 2000 N N N N N N Y N N N
Outlook 2002 N N N N N N Y N N N
Windows  2000 N N N N N N N N N Y
                    

Still have questions? We can help. Submit a case to Technical Support.

Last Modified On: December 10, 2016