DirSync support in OpenLDAP

Hi Team,

We have a OpenLDAP Proxy in front of Active Directory servers and all client applications perform ldap operations via the Proxy. One of the applications seems to be not working as expected and when we checked the logs we see this error

SEARCH RESULT tag=101 err=12 nentries=0 text=critical extension is not recognized

After discussing with the app owner we understand that we need to enable support for dirsync. Can you please let us know if OpenLDAP supports DirSync and what exactly needs to be done on the OpenLDAP proxy. Thanks you for your help !