Good afternoon, 
So let's say I have two campaigns/divisions: one for a resort and the other for a hospital. The resort may have external contacts like area attractions, restaurants etc. while the hospital might have external contacts like other doctors they work with or something. So when looking at hospital contacts, we don't want to see restaurants and stuff and vice versa. This (admittedly contrived) scenario is actually not all that far off from reality; IMO what I would expect to be "internal contacts" (if there is such a thing) are set up as external. Anyway, I need to find a way to get a list of contacts by campaign ("division" in API slanguage) but it seems there is no clear-cut way to do this. At this point I'm thinking of setting up a database table on our end where admins can do this, but I'm thinking maybe I'm missing something. Is there a way to get which divisions have which contacts? I talked to one of our admins this morning and he suggested "by organization", but the externalOrganization property doesn't exist on some contacts, and their IDs don't match any division IDs (which of course makes sense) on others. So that just doesn't sound reliable to me. Any ideas?
I ended up setting something up on our end, a DB table and admin dialog box for linking campaigns to external contacts. But I'm glad to hear it's a thing you're working on.