The Dirsync Read workflow will only update objects which have an updated USN value since the last sync.
A full read is required.
A full Read must be performed. Follow these steps to change the Read workflow step from Delta to Full Read:
Open the ODM AD Dirsync, hamburger menu, Environments. Select affected environment and click Settings. Change the filtering so there will be no objects in scope, either through an OU list, pointing to an empty OU, or through the advanced LDAP filter by some attribute to non-existing value.
Set environment to 'Reconcile on next read' checkbox.
Run a Read workflow. This will clear the ODM AD back-end database.
Edit affected Environment again and return your filtering to previous values, so ODM AD will read AD objects back.
Run a normal workflow. This will perform a Full read of the environment, read the missing attributes' values and write them to the target objects.
Additionally, you can select the "RESET DELTA READ UPDATE SEQUENCE NUMBER(USN) ON NEXT READ" option which will force to do a full read. This option can be found under Environments -> <Your local environment> -> Genenral, as shown below:
