"Support groups" is checked, but when I click "AutoConfigure" I get,
EPMCSS-05147: Failed to execute automatic discovery for group configuration. Server returned empty list for the specified group identifier. Verify group identifier value. Example cn=HypGroups. Wild cards are not allowed.
...I want to see all the users from AD, which I can so I don't think I need to define a "Group" in AD...
What else could it be?
Are you trying to create an Active Directory group from Shared Services? If yes, then it is not possible, you'll have to add that group in AD.