This is why the bring-your-own commercial device idea doesn't work for many Defense and Government activities. I realize it sounds really cool to be able to direct artillery fire with your smartphone. But think about all the buggy applications you have on your smartphone... do you really want to be sending fires data with something that's just going to crash or hang because Candy Crush installed wrong?
Some other posters seem to be trying to connect this to Hillary Clinton's recent campaign. Really, the easy link it to compare it with Hillary's private e-mail server. Aside from the whole "don't circumvent the FOIA" thing, this is another why we don't want you doing public business on private servers. Government data is going to be attacked by government operators, if only to see what they can get away with. So it needs to be known so we can give it the government-level defense that it needs.