Does anyone know how easy it is in the Big 4 to switch offices from your internship office to where you start full-time (assuming you receive an offer). 

I assume the firms obviously prefer you not do this, but when interviewing in the Fall for summer internships, this is 2 full years from when you will be working full time after graduation.  I've heard from other Big 4 interns that they sometimes ask you this during your exit interview when finishing up your internship? 

I don't want to piss anyone off, and I don't want to have to start the recruiting process all over if I ask this at the end of my internship