@runnergirl - There are a couple of older discussions from 2016 but I wasn't able to find anything recent. I think @athenalee has discussed it's use in a transplant discussion and may have some information to share with you.

-- Is anyone here on, or been on, mycophenolate for PN?: https://connect.mayoclinic.org/discussion/is-anyone-here-on-or-has-anyone-here-been-on-mycophenolate-for/
-- Mycophenolate mofetil with Plaquenil: https://connect.mayoclinic.org/discussion/mycophenolate-mofetil-with-plaquenil/

Have your tried using Google Scholar (https://scholar.google.com/) to find information? Here's the search results using the search phrase "Mycophenolate for autonomic neuropathy" --- https://scholar.google.com/scholar?hl=en&as_sdt=0%2C24&q=Mycophenolate+for+autonomic+neuropathy&btnG=