On mobile app, we are trying to sync the customer ID but not sure when that needs to occur. Here is the current scenario:
#1 Non-Registered User Launches App
On app launch, demdex.net call containing parameter d_cid_ic with value DSID_20915=device advertising ID fires.
#2 Non-Registered User Signs into App
On sign-in event, a new demdex.net call containing parameter d_cid_ic with value XYZ_id=uniqueuserid fires.
#3 Registered User Launches App
On app launch, demdex.net call containing parameter d_cid_ic with value DSID_20915=device advertising ID fires.
The question we have is around situation #3. When a registered user launches the app, should there only be one demdex call that syncs the device advertising ID or should we be expecting two demdex call? One that syncs the advertising ID and one that syncs the unique user ID seen in #2?