Collaboration Data Objects for NTS (CDONTS) is a Simple Mail Transfer Protocol (SMTP) based 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 quantum leap 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 as noted in the following table:
|Version||Messaging Lib |
|Rendering Lib |
|CDO for NTS |
|CDO for Win2K |
|Exchange 5.0 Client||Y||N||N||N||N||N||N||N||N||N|
|Exchange 5.0 Server||Y||Y||Y||N||N||N||N||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|
|Exchange 2000 SP1||N||N||N||N||N||N||Y||Y||N||N|
|Exchange 2000 SP2||N||N||N||N||N||N||Y||Y||N||N|
|Exchange 2000 SP3||N||N||N||N||N||N||Y||Y||N||N|
Starting with Microsoft Exchange Server 2007 Beta 2, neither the Messaging API (MAPI) client libraries nor CDO 1.2.1 are included. Therefore, functionality is missing, and many application depend on this functionality. Microsoft Exchange MAPI and CDO 1.2.1 provide access to these APIs. These APIs provide access to the contents of MAPI stores.
Note Because this version of CDO is included with the Exchange 2003, we do not support installing this version on a computer that has Outlook installed. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
Note CDO version 1.2.1 refers to the version of the API not the version of the DLL which implements the API. The DLL contained in the Outlook 2007 CDO download is version 6.5. This is not an update to CDOSYS which is referred in this article as version 6.0.
When using Exchange to install CDO 1.21, you can use one of the following methods to install:
- Install Exchange Server (Exchange 5.5, 2000, and 2003)
- Install only the Exchange Administrator (or Exchange System Manager) utility (Exchange 5.5, 2000, and 2003)
- Install Outlook Web Access (OWA - Exchange 5.5 only)
By default, Outlook installations do not include the CDO 1.2x component. When you view the options for Office or Outlook setup, CDO is listed under the options for Outlook.