title: Links in previews of messaging extensions in Microsoft teams apps
body: <p>I've been working on a messaging extension app that goes through some database and gives cards as results. However, Microsoft teams does not seem to let me have more than 50 cards in the preview of the messaging extension. So, I am trying to create an openUrl link directly on the preview as a 50th card, or somewhere the link can be seen on the preview. My first thought was to give the last (50th) card a tap action so it takes users to the webpage I need, but I could not find any examples or helpful documentations I can use. I do not believe teams allows me to have buttons on my preview cards so that might be the only way I can do it. I am using hero cards on my preview. I need help making use of cardActions. I do not know if there are other ways to have links in the preview sections of messaging extensions, so please let me know if there is anything I might be able to use.</p>