I am trying to secure Adobe reader on IOS. There many, many issues. How can I - prevent save to local device; oen only iin other secure applications

The default DLP options in adobe Reader are woefully inadequate, or just don't work.   I need to secure this app if we are to distribute it company wide on IOS.   I need to:

Prevent save to local device;

Open only in secure email client - currently defaults to native email client which is not secure.

Allow save to ONLY secure locations - this is not the same as the first option. Presently I can't even display my secure locations.

I have worked with MobileIron and have been pointed to Adobe. The built in DLP options for Adobe reader are set.