I've checked that CIFS is setup right and Active Directory seems to have joined the domain correctly. When I check from the command line my AD users are listed. They are not shown using the GUI though and attempting to map the shared folder doesn't accept login credentials. I could reboot back to the old version and I assume my users would at least be able to see their data again, but I'd prefer to get it working again with the new version. What might I have missed?