[diligiant]

There is a slight issue: French officials likely often exchange with their colleagues from other EU countries (or the EU itself in Brussels).

Using what then? will they go back to using pigeons or will President Macron force Olvid upon all European administrations?

[N19PEDL2]

We could say that this is another case where the European Union has failed to act united in pursuit of a common goal.

[lencastre]

Obviously the latter. EU will mandate installation of this app.

[ratg13]

Why would you not use diplomatic cables or encrypted e-mail?