Application Directory Partition collects data from applications. This is distinct from the other partitions as there can be as numerous or fewer partitions as needed. Because the Microsoft DNS server has data that requires to be saved and replicate throughout the domain or forest, this is a solid option for an application partition. DNS utilizes application partitions to collect the data from Active Directory Integrated zones. Once saved in the application partition, similar to any other partition within the Active Directory database, it is replicated to the essential Domain Controllers applying the Active Directory replication system.