On a computer that is running Microsoft Office Outlook 2010, you install the Conferencing Add-in for Microsoft Office Outlook 2007.
You set the value that appears in the RemoveConferenceCall registry key to 1. This disables the Schedule a Conference Call button.
In this scenario, the Schedule a Conference Call button is still available.
To fix this problem, follow these steps:
Install the following cumulative update:
2029027 Description of the update for the Live Meeting Conferencing Add-in for Outlook: July 2010
Modify the RemoveConferenceCall registry key, to do this, follow these steps:
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
Exit Office Outlook.
Start Registry Editor:
In Windows Vista, click Start, type regedit in the Start Search box, and then press ENTER.
If you are prompted for an Administrator password or for a confirmation, type the password, or click Continue.
In Windows XP, click Start, click Run, type regedit, and then click OK.
Locate and then select the following registry sub key: