Which of the following is NOT required for Attribute Sync to work?

For Attribute Sync to operate effectively, there are several critical components that must be in place. Defined attribute mappings establish how specific attributes in the source system correspond to those in the SailPoint environment, making them essential for the synchronization process. Correct user roles ensure that the appropriate permissions are applied and that the right attributes are synchronized to the right user profiles. Aggregation of attributes is also crucial, as it consolidates relevant user information that facilitates the sync.

On the other hand, having test users in the system, while useful for validating functionality and testing configurations, is not a prerequisite for Attribute Sync to work. The synchronization process can occur regardless of whether test users are present. Thus, the lack of test users does not prevent attribute synchronization from functioning, which makes this the correct answer in the context of the question.