A solution has been found, thanks to our IT! It's a simple radio button that needs to be changed in IIS. Once open, drill down to:
<SERVER> > Sites > Default Web Site > click on portal
Scroll to 'SSL Settings' and double click.
You will have a checked box ('Require SSL') and three radio buttons for 'Client certificates'
Select Ignore.
Now portal should work, and you will have to do this same process for the server.
Simply click server (mine was on the same machine, right under 'portal')
This solved all the issues we were having. Duplicates of published maps/collected features/etc., collector and field maps not working, weird certificate errors for pro, and probably a bunch of other issues I never ran across.