Hi Marc,The partner id sync happens on the 1st visit itself. The
following steps describe how ID matching works when a partner initiates
this process:Identify user: A new visitor arrives on a web property
that's tagged with the partner's media, ads, or data collection
code.Send User ID: Partner's code loads the Audience Manager ID Sync
URL, attaches the partner user ID, and makes a call to Audience Manager
ID Sync URL.Synchronize IDs: Audience Manager receives the call and
matches the user ID to...