How do I export vertical video in Adobe Premiere CC?
In Premiere Pro, if you change your sequence size to match your source, you can export the vertical video that way. In the project panel, right click your sequence and change the frame size to the frame size of your video.



You can then export with the preset of Match Source (the bitrate depends on your project needs).

Additionally, you can also export the video with the preset of your choosing. Uncheck the "Width and Height" and type in the appropriate resolution (example is below).