Default [Q] Mobileiron and native exchange instead of touchdown

Hi all,

I was searching through the forums but can't seem to find an answer for this. I have a Galaxy S5 through work and the only way for me to get my corporate email is through Mobileiron/Touchdown. I don't mind being not rooted, but I would definitely prefer to use native exchange over Touchdown. Is there a way to use native exchange instead? I tried the "exchange bypass" thread but the apks won't install.