During the Second World War, the Suite provided a home for the FO Cyphering Department, and afterwards, plasterboard partitions divided the rooms into offices for the Legal Advisers and others.

Thus a bureau des fonds with a wide range of responsibilities including control of the ministry's finances was set up in 1725, a bureau du chiffre for the cyphering and decyphering of despatches in 1749 and a bureau des interprètes in 1768.