When you want to text message someone's cell phone from your computer you
use their cell phone number as their address. When I do this Outlook gives
me an error message that it doesn't recognize it as an email address (I
assume because there is no @whatever) and will not let me send. I do not
see a way to override this and send anyway, surely it must be there. Could
someone please tell me how to do this.

Thanks in advance... Bob