The MoD said the spoof was "brilliant" and the crash did not cause problems.
A spokesman said: "The soldiers maintaining their morale on operations is always important.
"The fact that it proved so popular in the office and caused the system to crash is unfortunate, but this did not affect operations and the system is up and running again."
Nothing to do with fun detectors - I presume our highly efficient (!) intranet system cannot cope with even more spam. At least they admitted it was good!