additional users do not receive a password

additional users do not receive a password

We are trial testing the subscription version of zohocrm ( ZoHo CRM On Demand). We have created 2 additional users with valid emails. They never received an email with a password.
Even when we reset the password, there is no email sent.
When we log in with their Zoho ID, and we indicate we lost our password, the application recognizes the Zoho ID and even the question to generate the password. But again the email does not arrive.

Can someone tell us what to do to obtain these password?
Jan Vandebroek