Flash Missions are time-sensitive, random challenges in Upland, offering in-game rewards like UPX for completion.
Upland will announce via phone push notification a new bonus flash mission. In the mission center, you will see the mission including its requirements, duration to complete, and the reward. Players will be notified of this mission via push notification to your phone. Ensure you have notifications enabled to know when these challenges go live. Time is of the essence.
Learn about missions and all the starter missions here.