Haven't come across that yet.
Where I work, there are personnel from all services as well as from foreign nations walking all over the compound. Not positive on the rules, but sometimes you will see say a Navy petty officer salute say an Army officer, but sometimes not. Today, I saw a Navy enlisted give a sharp salute to someone in a uniform that I didn't recognize, but it definitely wasn't US. I think they were Aussie. Anyways, the lady officer looked a little confused, but snapped a salute back. That brief interaction sort of made me smile.