Thank you for pointing it out.

I overlooked this part.

Now groundOfMembers works as expected.

On Mon, Sep 17, 2018 at 12:59 AM Ryan Tandy <ryan@nardis.ca> wrote:

On Fri, Sep 14, 2018 at 10:05:09AM +0900, tran dung wrote:
>Is this expected behavior of groupOfMembers or is something missing in
>memberOf overlay setting?

See the 'memberof-group-oc' setting in the slapo-memberof(5) man page.