This article was previously published under Q244486
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IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
After upgrading from Outlook 97 to Outlook 2000, and then turning off Microsoft Schedule+ as your primary calendar, you are not able to add delegate permissions to your Outlook calendar.
Choosing the option to Use Schedule+ as my primary calendar while running Outlook 97, sets a key in the Office 8.0 registry values called, UseSchedPlus. Among other things, this key keeps you from setting delegate permissions to your Outlook calendar.
When you upgrade to Outlook 2000, setup installs a new set of registry entries for Office 9.0. When you turn off the option to use Schedule+ in Outlook 2000, the Office 9.0 key is turned off, but the Office 8.0 value for the UseSchedPlus key remains on, therefore delegate permissions to your Outlook calendar are still unavailable.
To resolve this problem, obtain Microsoft Office 2000 Service Release 1/1a (SR-1/SR-1a).
To obtain SR-1/SR-1a, click the article number below to view the article in the Microsoft Knowledge Base:
245025 OFF2000: How to Obtain and Install Microsoft Office 2000 Service Release 1/1a (SR-1/SR-1a)
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
To Modify the UseSchedPlus Key
To temporarily workaround this problem, manually modify the UseSchedPlus key in the Office 8.0 registry values.
Click Start, click Run, type regedit, and click OK.