I have many attribute groups in Contact Builder and all of them, when I click into them and look at the Data Extension linking, they all show Data Source as Unassigned. It doesn't seem to be affecting anything as everything is still working properly. Does anyone know what this does, if anything? The documentation is not clear at all on this, or Custom Data Sources for that matter.

enter image description here

  • Did you see this page in the documentation? help.salesforce.com/… Basically, attributes data source ascription is used when you want to indicate between multiple sources (if you have multiple sources). May 1, 2018 at 14:23
  • 1
    Yeah I saw this page, but like everything else, it's not very clear. I'd love more detail about how to use custom data sources, etc. I assume that if I map a custom data source I'll see it in the drop down? May 1, 2018 at 17:44

1 Answer 1


You can create a custom data source and then assign attributes to the custom data source. This is informational only and is intended to be used for data management purposes.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .