We use a secondary service for junk/phishing protection and would prefer not to have the microsoft "report junk/phishing" in the mix as well.
We have created and assigned an OWA policy to users to disable junk and junk reporting
JunkEmailEnabled : False
ReportJunkEmailEnabled : False
When I log in as the user who has this assigned, I still see, and I can still send junk reports.
This is for Exchange 2016 on prem.