No audio or video option as a host

I have no audio or video when I log into a meeting as host. Our IT Department has made sure all updates are performed on the PC and through the APP both. They tested audio in the app and it works if your not in a meeting just in the test function. As soon as I am logged into my meeting a line is put through the audio and video options. I have tried logging on to two different computers and get the same result.