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For Outlook and Exchange Server 5.5 and earlier, the current version is 1.21. See
Exchange 5.5 Collaboration Data Objects (CDO) Patch for post 5.5
SP4 hotfixes.
CDO is no longer available for separate redistribution. For server
applications, you will need a version of CDO that is not subject to
Outlook security prompts. If you are running Exchange 5.5, install
either the Exchange Administrator utility or Outlook Web Access. If
you are running Exchange 2000, install the Exchange System Manager
on the server. We understand this counts as one client access
license.
For client applications, you must install Outlook in order to
install CDO. In Outlook 2000 and later versions, CDO is included
with Outlook but is not part of the default setup, nor will it
install on first run. Therefore, you must explicitly select it during
a custom setup or use the Windows Installer object library to
programmatically install CDO, as shown in the Items
Command Bar COM Add-in sample.
In Outlook 98 and 2000, CDO is officially supported
only in Corporate/Workgroup mode. However,
most techniques do work in Internet Mail Only mode. Microsoft
considers IMO mode + CDO to be a "use at your own
risk" configuration.
In relation to the
Outlook Email
Security Update,
Microsoft has issued a security patch for CDO and Outlook 98 and
Outlook 2000 that
affects all client applications that use CDO. See Microsoft Outlook
CDO Security Update.
The patched version of CDO reports the same version as the unpatched
version -- 1.21 -- so there is no way for an application to tell
which version is in place.
Some confusion exists over other libraries with "CDO" in their
name -- CDONTS,
CDO for Windows 2000, and CDO for Exchange (2000/2003). The
first two can be used for creating and sending messages, but
otherwise have little client application in an Outlook
programming environment. See
CDOLive - Digging deeper
into CDO, History & Future for details on all the different
versions of CDO. |
