https://bugs.openldap.org/show_bug.cgi?id=9227
--- Comment #1 from Howard Chu hyc@openldap.org --- (In reply to Quanah Gibson-Mount from comment #0)
An issue with syncrepl using exattrs is that the local replica may delete attrs that are being managed by locally deployed overlays such as memberOf (See bug#7400 for example). This behavior needs to be fixed so that the locally managed attributes are not deleted when included in an exattrs statement.
Actually, it looks to me like exattrs has been handled correctly for quite a few years now. We need to see a test case showing that it's actually broken.