Why does sssd ignores the group nesting level ( ldap_group_nesting_level) set to zero , in Red Hat Enterprise Linux 6?

Issue

• To prevent sssd from performing nesting, setting up ldap_group_nesting_level = 0 in /etc/sssd/sssd.conf does not have any effect. It seems sssd ignore this option value and still does nesting operations.

• For example, on server, groups have below relation with each other:

GroupB is member of  GroupA
GroupC is member of GroupB

UserA in GroupC = With nesting membership should show A,B, and C.  Without Nesting should show C only
UserA in GroupB = With nesting membership should show A, and B.  Without Nesting should show B only

• With ldap_group_nesting set to "0", if following command is executed:

$ id UserA

The output will show GroupA, GroupB, GroupC, but as mentioned above, it should only return GroupC.