The email calendar is available to over 2.1 billion active users: If your prospect opens your email on Gmail, G Suite, Outlook, Yahoo, Hotmail, MSN or Mail.ru, your calendar will appear in the email. They see your calendar in the email and can interact with your calendar in the email using the latest email marketing technology, Actionable Messages and AMP.
If your prospect does not open your email on Gmail, G Suite, Outlook, Yahoo, Hotmail or MSN, your calendar will not be inside the email. Instead, the email will automatically include a button with a link. The link redirects them to a new web page with your updated calendar and availability to make an appointment.