Entering Marrakech airport my husband saw an exchange desk & suggested exchanging our Durhams to USD. Since we had a 4 hour connection in Casablanca we knew we would be buying lunch & decided to exchange there after we spent what we needed to. Little did we know there is not an exchange desk available. My husband & son tried to exit & then re-enter, they were not allowed by security. We decided to "shop". Strangely most of the shops are in Euro & deny taking Durhams. But if you get a nice salesperson they will take Durhams "as a favor".