Create an Add to calendar link in an email message
https://support.microsoft.com/en-us/office/create-an-add-to-calendar-link-in-an-email-message-34f8ea28-322a-4867-b423-2998f9634e59
WEBStep 1: Create an appointment. If you already created the appointment on your calendar, skip to the next section, Step 2: Send an iCalendar attachment. In Calendar, on the Home tab, in the New group, click New Appointment. In the Subject and Location boxes, type the subject and location information. Enter the Start time and End time.
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