Assign Attributes to a Custom Data Source

Follow these steps to assign an attribute to a custom data source in Contact Builder.

1. Click Data Sources.
2. Click Select Data Sources Now.
   

   Note If you don’t have any unassigned attributes, you don’t see the Select Data Sources Now option.
3. Choose the checkboxes next to the attributes to assign.
   

   Note You can’t assign attributes created from system-created attribute groups.
4. After you click all applicable check boxes, click Select Data Source.
5. Select the data source to which you want to assign the attributes.
6. Click Done.