new ifolder3 install on OES Linux SP2 server

I set the LDAP search too high up the tree, and the user list is populated
with a load of system users I would prefer real users didn't see

I modified the LDAP search to lower user containers, and synchronised,
however the users which are now not within the search still remain in the
list of users

I have disabled the iFolder account for these users, but I would actually
like to remove them from the list of users in iManager, and the share list
at the client

is this possible?

many thanks