Just a heads up that Skype for Business has just hit the Apple App Store, following announcements that it was on the way.
No sign on the Android Google Play store yet, but I’m sure it won’t be far behind.
If you have Lync 2013 installed on an IPhone and auto updates on it will be updated to Skype for Business. It’s a new universal iPhone/iPad app, so iPad Lync 2013 users will have to go and download the new app.
Support for Active Directory Authentication Library (ADAL) base multi-factor authentication is called out as a new feature.
Full annoucement here: https://blogs.office.com/2015/10/14/skype-for-business-ios-app-now-available/