Could not find samba domain for {0}

I get the following error in Imanager on OES2 when trying to add my
first user to a Samba group:

Could not Samba enable the user for group,
<ServerName>-W-SambaUserGroup. Could not find samba domain for {0}.

Now, this is a OES2 add on after a SLES10 install, so I had to follow
the information detailed in the OES2 readme, section 2.13.4 (Schema
attribute mods). That seems to have worked correctly since the group
name mentioned above does indeed exist now. I just don't know how to
proceed to hurdle this next error.