Audience Manager Profile Link Data Source targeting
On this page: https://marketing.adobe.com/resources/help/en_US/aam/c_inbound_crm_data_ingestion.html, it clearly states that "If the data provider is configured to use Profile Link for cross-device targeting, the data available for targeting shortly after an ID sync identifies to the matching Audience Manager visitor ID."
I have assumed that this means, you can upload a data file to a cross-device data source BEFORE an individual ID has been used in any browser, and then when an individual ID is seen in a browser (in an authenticated state) - the data will be available for targeting (cookie based destination).
As opposed to a NON profile-link/cross device data source, where Audience Manager must have received at least 1 ID sync/hit for an individual ID BEFORE a bacth file is uploaded so that any targeting will be available (cookie based destination).
However I cannot get this to work.
I have uploaded multiple files with NEW IDs to a cross-device data source - yet it is only those IDs which have ALREADY been seen in a browser (BEFORE the file upload) which ever have data returned for targeting (cookie based destination).
The ones which have never been seen in a browser yet - never resolve to any segments for the data which was uploaded.
We have server side forwarding enabled and I am using the setCustomerIds functions as requested for Profile Merge functionality.
Is there something special needing to be done to enable this functionality to work as described?