Since this was something, we were offering to the client, it was strictly low budget and we had to work from offshore.
I had to provide a UX solution within 1 week (i.e. 5 days). It was a challenging task, since we knew very little about the business, the users, its environment, the pain points etc.
All understanding I got was from the BA, who was working onsite. He provided me with the screenshots for the application and a brief of what the client was looking for.