Update 4/15/20: I have now tested this with AD Import and both SharePoint 2016 and 2019. It’s the same problem in both versions. This problem manifests itself in a few different ways: You create an Audience based on “Member Of” the “Domain Users” group. You notice there are only a couple (or maybe even zero) … Continue reading SharePoint: Profile Sync and the “Domain Users” group – the Primary Group problem