I have a number of zoho mailboxes plus a 365 managed account that I access using the MS Outlook app on my android phone.. Approximately, every 6 months the app loses the account settings for the zoho accounts requiring me to re-enter all the settings.  This happened for one account in May 2019 but has just happened for all 3 accounts yesterday. I've re-entered all the settings for one of the accounts but it just comes up with a Log-in Error, check email and password and try again.  Well, I have numerous times and with no success but the 365 account is fine.  Does anyone know if this is a zoho/MS issue or even better a fix please as if I can't get these accounts back I may need to change my mail box services?  Many thanks in advance.