Applications pull user data from several sources. A cloud application identity system should provide services that are consumable by all types of applications. What good is having a totally managed cloud database if your application can only talk LDAP?
Unison can expose several data services as LDAP that can be consumed by applications with built in LDAP support without having to synchronize data into another directory. In addition to talking to multiple sources, Unison can join data across sources. User attributes may come from your Active Directory but authorization data can come out of a local database. Utilize cloud databases as directories without the hassle of having to stand-up and manage a stand alone directory.