I hope you have followed the exact same steps mentioned in the help document- https://forums.adobe.com/docs/DOC-5873#jive_content_id_Open_from_Mail
You may also check whether application is allowed to access data or not?
Settings>Adobe Acrobat>"Allow Acrobat To Access"
1 person found this helpful
It turns out my company had apparently set up restrictions on the acrobat available directly from iPhone apps. My company has its own app store for approved apps. I was directed to purge the one I had installed from Apple and used the version (same version) from my company app store. This one apparently loosened the restrictions and the app works perfectly now. Thanks for your help.
Thanks for sharing the update.
Let us know if there is any further assistance is required.