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I did run across another possible fix:
Use one of the following two methods to address this issue (Outlook development prefers the second, NoOST=3 value, solution):
Disable the Process requests and responses on arrival option on the delegate's computer. The side effect of this option is that the delegate does not automatically process meeting requests for itself.
Add the NoOST registry value and set the value to 3 to disable the use of the .ost file for caching a local copy of the calendar.
The file that you need to enable this functionality is the Outllib.dll file. You can obtain this file by installing the Arch98en.exe file from the following Microsoft Web site:
http://office.microsoft.com/downloads/9798/arch98en.aspx
NOTE : This file also fixes the problem that is described in the following Microsoft Knowledge Base article:
Q150827 Outlook 98: (CW) Synchronization Properties Tab Is Missing Install this file, and then change the registry to add the NoOST value of 3 :
Quit Outlook.
Click Start , click Run , type regedit , and then click OK .
Click to select the following registry entry:
HKEY_CURRENT_USER\Software\Microsoft\Office\8.0\Outlook
If the Outlook key has a subkey namedOST with a NoOST value, go to step 8. Otherwise, right-click the Outlook key, point to New on the shortcut menu, and then click Key .
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