Two-way Exchange folders synchronization
Two-way synchronization involves a mutual exchange of data in a group of folders (Folder ring). When any change occurs in one of the folders in the ring, this change is immediately propagated to all the folders within the group. Once the synchronization is done, all folders will contain the same set of data.
For example, if you have five Exchange folders with contacts synchronized in two directions, then by creating a contact item in one folder, it will result in adding the same contact to the remaining four folders. If in any of the folders you update the phone number, the change will automatically be reflected in other folders included in the Folder ring synchronization.