Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
I have had the same issue for a few months on my Galaxy S10. I have a pretty large inbox so resetting the account and downloading all the messages took an extremely long time.
I have found recently that just restarting my phone gets the emails working again for a short while before stopping again. A real pain.
I find that my Microsoft Teams app on my phone stops working at the same time as the email so perhaps this is something to do with authentication?