[389-users] Windows Sync Agreement issues

I have an Active Directory Setup With the users and groups. I am interested in getting groups information from a subtree in AD called *ou=ABC,dc=example,dc=com* But I get the following error " *The consumer Initialization has unsuccessfully completedThe error received by the replica is " 1 Connection error: operation failure - Total update aborted*" But when I see the destination subtree on the *Directory Server*. I see the users and groups have been successfully copied with the even posix info. First question is why am I still getting data if there is connection issue. When I change the Active Directory source subtree from *ou=ABC,dc=example,dc=com* to *cn=Users,dc=example,dc=com*. The above error does not show up. Please can someone advise me on this issue? Thank you Abhishek Deb