Start Microsoft Outlook. From the main Outlook window, go to the “Tools” menu. Select “Trust Center” from the “Tools” menu. The “Trust Center” window will open. Select “Add-ins” from the left pane of the “Trust Center” window. A list of installed Outlook 2007 add-ins will be displayed. Select the add-in you want to disable by [...]

On the Tools menu, click Options, and then click the Other tab. Click Advanced Options, and then click COM Add-Ins. Do any of the following: To enable an add-in, select the check box next to the add-in. If the COM add-in you want is not listed, you need to add it to the Add-ins available [...]