When searching the App Store, use the search term Skype for Business to locate the correct app. Skype for Business, formerly Lync 2013 for iOS, extends the power of Lync and Skype to your favorite mobile device: voice & video over wireless, rich presence, instant messaging, conferencing, and calling features from a single, easy-to-use interface. Uninstall the Skype for Business app, restart the device, and reinstall the app. The Skype for Business for Android looks for different DNS records than the Skype for Business desktop client. This article covers how to install Skype for Business on your Apple mobile device (iPhone and iPad). On the iPhone app, I had to add domain\username before signing in. They are available as free downloads from the respective App Stores. Using the Skype for Business admin center. If your organization has both Skype for Business Server and Lync Server deployed, the default client experience will differ depending on server versions and UI settings. The Skype for Business for iOS app brings Skype for Business presence, instant messaging (IM), and voice and video calling to iOS devices. Let Skype for Business users add Skype contacts. For more information, see Phones and Devices for Skype for Business. Skype for Business (Lync) mobile apps for iPhone, iPad and Android are now available. You cannot make a video call between two different phone systems. Skype for business iphone advanced options options.