My users haven't received the ClickHSE email
ClickHSE uses a very robust email system so the likelihood is that the email has been sent.
Please check the email address for the user and also ask the user to check their Junk/Spam folders.
If your organisation uses email firewalls you can learn more about adding our system emails to your Whitelist here
If you have ordered an individual course and not received your activation email please contact us here