You can use Marketing Profile to search for anonymous users and view their interactions with the application.
The Marketing Profile search functionality provides an additional Search by UID checkbox to allow for searching of anonymous users.
When this checkbox is unchecked, the search looks for existing customers based on their identifier and name.
When this checkbox is checked, the search looks for anonymous customers using their unique identifier.
Upon clicking the link for the anonymous customer, their interaction details are displayed.
At a later point, if the anonymous individual identifies themselves as a known customer, the anonymous interaction details are merged with the customer's interaction history. Searching for the anonymous individual (by their unique id) now reveals the identified customer in the search results.