SailPoint Aggregation is the process of pulling the data from the target application.
This data could be two types:
Account data means information of the identities having an account in the target application.
Group data gives information about the various entitlements of Identities hold in that target application.
SailPoint aggregation is configured during application onboarding.
The frequency to fetch or poll the target application depends upon the frequency of the business requirement.
This aggregation is configured in Sailpoint IIQ Tasks.