Hi Thomas,
users get DUCS enabled during the import process.
When you import them, you will see the following entries in admin4.nsf DB on Domino:
"unrecognized request 5001"
This will also have a response document saying something like "Performed Action on X/X/X"
You could try to re-request the admin4.nsf request for these user so that adminp executes them again.
Once done, check with Notespeek if the Users has been enabled OK.
But chances are slim that this will work.
If it doesn't, you will want to delete the users in question and reimport them.
You can use the following agent to remove the Notes attributes:
http://www.ciscounitytools.com/App_NotesCleaner.htm
Kurt