Ami me funcionó modificando las siguientes lineas, y colocar el CN del grupo de tu AD que quieres sincronizar.
# The query to select objects that represent the groups to import that have changed since a certain time.
ldap.synchronization.groupDifferentialQuery=(&(objectclass\=group)(!(modifyTimestamp<\={0})))
# The query to select all objects that represent the users to import.
ldap.synchronization.personQuery=(&(|(memberof=cn\=gpoalfresco,ou\=grupos,ou\=dg informatica,OU\=CAJ Users and Groups,DC\=caj,DC\=com,DC\=mx)(memberof=CN=GRUDS,OU=Grupos,DC=intranet,DC=domain,DC=com))(objectclass\=user)(userAccountControl\:1.2.840.113556.1.4.803\:\=512))
# The query to select objects that represent the users to import that have changed since a certain time.
ldap.synchronization.personDifferentialQuery=(&(|(memberof=cn\=gpoalfresco,ou\=grupos,ou\=dg Informatica,OU\=CAJ Users and Groups,DC\=caj,DC\=com,DC\=mx)(memberof=CN=GRUDS,OU=Grupos,DC=intranet,DC=domain,DC=com))(objectclass\=user)(userAccountControl\:1.2.840.113556.1.4.803\:\=512)(!(modifyTimestamp<\={0})))
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# The group search base restricts the LDAP group query to a sub section of tree on the LDAP server.
ldap.synchronization.groupSearchBase=cn\=gpoalfresco,ou\=grupos,ou\=dg Informatica,OU\=CAJ Users and Groups,DC\=caj,DC\=com,DC\=mx