In this example, we've used the Teamup calendar. A web link is all that is needed to access this calendar. Get the weblink for your Teamup calendar.
Setting up the form
In FLG, create a new form. In Settings >Forms. Click the 'Source' button (at the top of your form) and paste in this code:
<body><iframe align="left" frameborder="0" height="450" scrolling="no" src="https://teamup.com/yourcalendar" width="100%"></iframe></body>
Just replace your calendars address
Click the source button and check at the top to make sure you have ticked: 'Make this form accessible from the lead summary'. Then click the continue button to save the form at the bottom.
Go to a lead in FLG and select the form to test
Here's our calendar
This is viewed through a form which can be accessed from a lead.