Mail app locking out exchange account
I would be grateful for your help.
I have my exchange mail set up on mail app on my IPhone with all the contacts and calendar events. Suddenly my phone started locking the exchange account and I have to go through a process of resetting my exchange password several times a day. I tried deleting the exchange account from the phone and setting it up again (both with automatic and manual settings) it seems to work fine, connecting to exchange and downloading mail and after a short period of inactivity locking me out again
Not sure what to do as I really need access to this email from my phone + all the contacts are there
Thanks a million
iPhone 8, iOS 12