Outlook 2007: Could not install the custom actions. The object could not be found

outlookoutlook-2007

I have a user who is getting a warning message dialog every time he opens a message window in Outlook 2007:

Could not install the custom actions. The object could not be found.

Clicking OK dismisses the dialog and everything appears to work fine.

Best Answer

Found the solution. It was caused by the Microsoft LiveMeeting add-in. It created a message form in the C:\Users\[current user]\AppData\local\Microsoft\FORMS folder that was corrupted. Deleted it and it fixed the problem.