BELMONT, Calif.--(BUSINESS WIRE)--RingCentral, Inc. (NYSE:RNG), a leading provider of cloud business communication solutions, today announced a deep integration of RingCentral Office® with Microsoft Office 365. It seamlessly blends RingCentral’s cloud business phone system with a leading cloud productivity work environment, giving joint customers a powerful solution that embeds RingCentral into their core productivity workflow. “RingCentral’s innovation in cloud business communications is helpi