You can rest assured that your conversations and files are encrypted with Transport Layer Security and Secure Real-time Transport Protocol as well as Session Initiation Protocol to set up and terminate audio and video calls. This includes status updates that let you see who is available, attending a meeting or giving a presentation. Skype for Business offers productivity features that will help you run your business. The program is compatible with Windows computers running Windows 8/8.1/10 as well as Apple and Android devices. While geared towards businesses or corporations, Skype for Business only uses 100 MB of hard disk space. 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. This allows you to retrieve your contact list from local directory services such as the Microsoft Exchange Server and Microsoft Outlook. It was designed by Microsoft for the Microsoft Office suite. Skype for Business is an enterprise software that offers instant messaging, audio calling, and voice conferencing capabilities.