My organization has a new requirement for filtering audiences, however, the field did not exist when we stood up Audience Builder. The field exists in a Synchronized Data Extension that is already referenced in Audience Builder so I feel like it should be pretty straightforward to add this field to the Attribute Library but I can't find any information on how to do that.
Is it possible to do it myself? Or do I have to go through our Marketing Cloud rep to get this added?