Yes or no and what is the implication of this story?
It would be trivial for computer professionals to detect outside traffic into a secured computer network.
Your computer network is only as secure as your software, hardware, and network lines.
Given the honesty of the last 8 years of Obama administration, I'd rip the whole thing out and start from 'scratch'.
I would investigate who removed the old computers, and find out where they are now relocated ?
If moved to the Obungler "shadow government", they are National Property, including the messages and software.
That's called theft !