Skype for Business is an enterprise software that offers instant messaging, audio calling, and voice conferencing capabilities. It was designed by Microsoft for the Microsoft Office suite. This allows you to retrieve your contact list from local directory services such as the Microsoft Exchange Server and Microsoft Outlook. All forms of communication held on this program are protected by the Skype for Business Server, ensuring that all messages, calls, and files are kept in the corporate intranet. While geared towards businesses or corporations, Skype for Business only uses 100 MB of hard disk space. The program is compatible with Windows computers running Windows 8/8.1/10 as well as Apple and Android devices.