Trespasser DLC

Trespasser becomes available after you coplete the main storyline. You can start it from the war table at the Winter Palace in Orlais.

I did finish the story so I'll go to the war table. Is it obvious there what  to do to start Trespasser?

thanks for the help

@iiMajesticCookie Trespasser should show up on your war table like many other missions do, and it will give you a warning that once you start it you can't go back. I believe (it's been a while) the marker is in Orlais. 
An easy way to tell if Trespasser installed correctly is to check whether your skills now have 2 upgrade options, and/or whether there are trials options in the difficulty settings within the game. If those things are there, Trespasser is installed and verified. 🙂 

If the DLC isn't there, make sure you're logged in on the main menu. The DLC may need a one-time online verification.