Switched my PC on Sunday morning and Outlook kept on asking for password for imappro.zoho.com and neither my usual password (which requires TFA) nor my app specific password worked.  I have tried on two different PCs, both win10 and Office 365.

ALSO when I log in as admin@mydomain, I have lost access to the admin control panel (or whatever it was called) which enabled me to manage the 6 or 7 users in mydomain who use Zoho Mail . . . 

What has happened?

My only guess is that I started a free trial of an upgrade from the FREE version to another, but didn't want to continue with the trial.  Has stopping that trial left me worse off than before???

Because I only have the free version, I cannot phone for support, and my two attempts to contact support (one via their web form, and then via email) have not received any replies . . .

I'm really stuck without a decent Outlook imap connection (though I've been struggling with the web version and my mobile app.)