Wasn't able to log in his mail account via Zoho Mobile App

Wasn't able to log in his mail account via Zoho Mobile App

One of my user  wasn't able to log in his mail account via Zoho Mobile App. However, it could be log in via desktop.

This is the error we got from the app:  http://prntscr.com/iwu6j0
"you need administrative permission to use this app zoho"