The Identity Manager drivers process events in the order they occur, which guarantees that all changes required for an event to successfully process are applied in the order they occur.
However, there are instances when you want a certain event to take precedence over others. For example, events that involve password changes, locking an account, or disabling an account should take precedence over other events. Identity Manager provides the Out of Band Sync feature that allows you to assign a higher priority to these events, so that they are processed before other events in the queue.
When you enable this feature for an attribute, Identity Manager creates a new cache for the driver for storing the Out of Band Sync events. You can enable or disable this functionality, by using the new setting included in the driver filter. Also, Identity Manager creates an Out of Band Sync status cache for maintaining the status of events, which are synchronized from the Out of Band Sync sync cache. By maintaining the status of events in the Out of Band Sync status cache, Identity Manager drivers avoid duplication of events or sending of old events from the base driver cache.