Installing the E-mail Security Update on Outlook 98 with CDO

However, many Outlook custom forms and applications use CDO, because CDO can do things that the Outlook programming model cannot -- such as retrieving the e-mail address of the person who sent a message or popping up a dialog where you can choose recipients from the Address Book. If you have custom applications that you know use CDO, you may want to modify the installation of the Outlook 98 version of the Outlook E-mail Security Update to keep CDO on the system by following the steps below.

You also now have the option of installing a secured version of CDO. See Outlook CDO Security Update.

Installing the Update with CDO | More Information

Installing the Update with CDO

1. Right-click on the patch download file, O98sec.exe, choose Winzip | Extract To (or the command for your extraction program), and indicate the folder where you want to place the extracted files.
2. From the extraction folder, open the O98sec.inf file in Notepad. 
3. Place a semi-colon in front of each of the following lines to turn that line into a comment. 
   
   UnregisterOCXs=RegServerCDO
   DelFiles=DelCDOFiles
   DelReg=CDO.RegServer
   
   Each of the three lines appears four times in the O98sec.inf file, in the four sections for the different modes and operating systems -- [MapiInstall], [MapiInstall.NT], [OMIInstall] and [OMIInstall.NT]:
4. Save the O98sec.inf file.
5. From the extraction folder, run Security.exe to install the patch. 

If you later want to install the patch on other machines and remove CDO, just take out the semi-colons you added to O98sec.inf in Step 3. 

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