Microsoft Corp has agreed the acquisition of Internet telephone company Skype for $8.5 billion in cash from an investor group led by Silver Lake private investment fund, its biggest deal ever, Microsoft said in a statement on Tuesday. The deal is aimed at improving Microsoft's existing portfolio of real-time communications products and services, the company said. Skype will support Microsoft's devices like Xbox and Kinect, Windows Phone and a wide array of Windows devices, while Microsoft will connect Skype users with Lync, Outlook, Xbox Live and other communities. Microsoft also said it would continue to invest in and support Skype clients on non-Microsoft platforms. Skype also provides services for applications for the iPhone and iPad, Motion's BlackBerry and Android phones.