Indexing uniquemember attribute in a group

[Gary LaVoy <glavoy@apple.com>]

So I tried to add an index line in slapd.conf for uniquemember and when I
try to start up the server I get an error saying I can't index that
attribute.

I get the same thing with owner.

But not with any other attribute I have as part of my groups.

Here is what I have today:

index           objectClass     eq
index           appledsid       eq
index           cn              eq,sub
index           givenName       eq,sub
index           mail            eq,sub
#index           owner           eq,sub
index           sn              eq,sub
index           telephonenumber eq,sub
#index           uniqueMember    eq,sub

Any clues as to WHY I can't index these two attributes?

Thanks!

Gary LaVoy
Apple Computer, Inc.