This is one of the many Microsoft Office 365 support out-going trunks. If you get a call from this number, it's likely a customer service agent calling you about an open support incident.
you couldn't possibly have been 100% sure of this since you took the time to look up the number. Or are you one of the scammers doing damage control and trying to make people think that you are working for Microsoft to get access to their computers so that you can steal money and information?