When was IMAP ripped out of new accounts?

When was IMAP ripped out of new accounts?

I have been setting up new companies with Zoho mail for years, starting them on the "free" plan and then some of them have grown and added other Zoho services. I discovered when I added a new account for a client today (moving them from a crappy Yahoo paid account) that IMAP is no longer an option for the free plans... Why? You just lost any new accounts from me...