Hi, Trying to populate ECID value to a custom XDM schema field, and referring to the following link, Accessing the ECID | Adobe Experience Platform It states that using Data Prep / Mapping is preferred, since all my configurations are done at client side using Launch / Tags, my first question is whe...

Web SDK also have the mechanism for cross domain / mobile to web-view tracking, https://experienceleague.adobe.com/docs/experience-platform/edge/identity/id-sharing.html?lang=en  

Hi, Would like to seek advice on marketing channels using derived field in CJA. The marketing channel derived field is done with the function template, however, most events are grouped under "Direct" in workspace report which was not expected. I've changed the Persistence as "First Known" as it look...

Data is collected by Web SDK just like how you send data to AA or AEP, Event Forwarding is one of the service options in Datastream (Server Side / Edge Network) for you to send data to 3rd party destinations. But I believe you still need to create an Event Forwarding property in Launch to specify wh...

Since you are using AA now, the following link are good articles for your question. Customer Journey Analytics overview | Adobe Customer Journey Analytics Customer Journey Analytics feature support | Adobe Customer Journey Analytics 

kdnctr identity stores an encoded copy of the ECID. see below for details, https://experienceleague.adobe.com/docs/experience-platform/edge/identity/overview.html?lang=en  

For web browers, it's when the Web SDK library cannot find the AMCV and kndctr identity cookie. 

Hi, Checking on how Web SDK handles the existing AMCV cookie, found that the expiry date of the kndctr identity cookie seems does not refresh when clicking several pages. While can see the kndctr cluster cookie expiry refreshes on every hit. My understanding is that this cookie carries the ECID, if ...

see if this helps, Solved: AEP Batch Ingestion Error | Updates are not suppor... - Adobe Experience League Community - 590921 

have you also checked the data set activity page to see if data are ingested successfully or any failed batches.