Out of Office Assistant says "Command not available" when you try to acitvate or deactivate autoreply

I came across this issue for the first time two weeks ago when someone was setting an autoreply and again today when someone was deactivating an autoreply. When you go to Tools -> Out of Office Assistant, it tells you "Command not available."

To fix it, you go here for Outlook XP:
HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\O

utlook\Resiliency

or here for Outlook 2003:
HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\O

utlook\Resiliency

and rename the Resiliency key to Resiliency.old

Microsoft does not say why this is the case, but their KB article on this is here:

http://support.microsoft.com/kb/327353