If you are working with (b)leeding edge technologies like Outlook 2007, and you have to create plugins that are to be installed for ALL users on a machine you might want to read this:
The one line I overread for (very) a long time said:
"in order for the instruction to execute we need to make sure that HKLM's Count value is different from HKCU's Count value"
So you create your settings staring with something like:
"Description"="My Fancy Plugin"
"FriendlyName"="My Fancy Plugin"
"Manifest"="[TARGETDIR]My Fancy Plugin.vsto|vstolocal"
This works perfectly unless you need to change things. Nothing gets provisioned if you just modify, lets say, the description. The following entry is causing office to ignore our
Provisiong only starts when the values are different, so delete the HKCU key or change its value.