Data flows between PUM and the Identity Vault by using the Subscriber channel.
The Subscriber channel performs the following:
Watches for additions and modifications to the Identity Vault objects.
Makes changes to PUM that reflect those changes.
You can configure the driver so that Identity Vault is allowed to update a specific attribute on PUM. In this configuration, the most recent change determines the attribute value, except for merge operations that are controlled by the filters and merge authority.