The HP 4120 IP Phone Series is optimized for use with Microsoft Lync Unified Communications, & can support Office 365, Microsoft's familiar Office desktop suite combined with the latest, cloud-based versions of Microsoft's next-generation communications & collaboration services. All Lync-optimized IP phone features are supported by the HP 4120 IP Phone Series, including Microsoft's " Better Together" mode, which leverages Lync's powerful collaboration capabilities.