Called asking for a coworker. I am required to screen all calls as we do not have transferrable lines. He became upset, first telling me he was from logic company, for insurance. Then he was from Microsoft. I asked him for his name he gave me Salman Kahn. I looked him up on our list and did not locate him, then he became mad saying that I am just an operator and began asking questions about SOMETHING, I couldn't even understand with the accent. Then said Microsoft has 10,000+ employees, i couldn't see all of them and said Now give him the phone or transfer me. I apologized that I could not and that all calls require screening and pre approval, that he would be required to provide contact information and I would pass it on to my coworker. He then started insulting me and my position and telling me about how small our company is. I informed him that the phone number he called from was provided to my coworker by email, along with his name. He said, thats not my number and was getting more mad. I apologized and repeated my procedure. He then hung up.  :) I worked for 4 years in Psychiatry so this guy had no chance in getting to me. Just needed to make sure I was confirming my assumption of this being a spam call.