Property context links allow you to attach the ID of a property to the link to another page. This way, when someone visits a property detail page, you can create a link to a contact form on another page. The email of this contact form will still contain the property information that the visitor just looked at.
To accomplish this, you need the URL path (just the part after the domain). If your contact form is at “wpplugindoc.onoffice.com/imprint/contact”, then the shortcode would be: [oo_link contexts='estate' path='imprint/contact']