Drag and drop the user Invite widget to your page, and click on the edit button and the widget designer will open.
In the General tab, you can choose to show a message or redirect to a page, after user is successfully created OR when the user exists.
Please Note: before you configure the user Invite widget, you must install the CRM solution on your Sitefinity site, and you need to configure your CRM with the Portal Invite Page URL. More information about how to configure your CRM and add Portal Invite page URL click here.