Neues Palais Media Center:
Copying can be done in the Media Center copy room (1.19.2.11). Print jobs (sent from specific locations; see below) can also be picked up there.
Griebnitzsee Media Center:
Copying can be done in the copy room (3.06.0.19a). Print jobs (sent from specific locations; see below) can also be picked up there.
This overview (in German, as PDF) shows where you can create and pick up print jobs.