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The appointment confirmation email which is triggered to all attendee’s attendee's email addresses when you add a calendar appointment is a standard template.
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Type (Property Valuation, Property Viewing, Meeting etc)
Location
Start Date/Time
End Date/Time
It also pulls in the the Subject field field. This field is a free text box for you to enter any information you need. If If you enter a URL link, then this link will be clickable by the recipient of the email. You can use this field to link to particular information or documents on your website. eg:
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