Skype for Business Server 2015 Cumulative Update 2 (CU2) has been released which includes Shared Line Appearance (SLA) and Modern Authentication (ADAL). SLA enables you to configure a workgroup with multiple devices that can each answer calls to a shared phone number (extension). SLA is only supported on specific Polycom phone devices (VVX300, 400, 500 and 600) with firmware update 5.4.1. Please note that SLA *is not supported* with the Skype for Business desktop/mobile clients OR with other devices (not listed previously). ADAL is designed to make secured resources in your directory available to client applications (like Skype for Business) via security tokens. ADAL works with OAuth 2.0 to enable more authentication and authorization scenarios, like Multi-factor Authentication (MFA), and more forms of SAML Authentication.
More information on Modern Authentication (ADAL) can be found here: https://technet.microsoft.com/en-us/library/mt710548.aspx
More information on Shared Line Appearance (SLA) can be found here: https://technet.microsoft.com/EN-US/library/mt612811.aspx
KB for CU2 and installation instructions: https://support.microsoft.com/en-us/kb/3061064
Components updated in CU2:
3134266 March 2016 cumulative update 6.0.9319.235 for Skype for Business Server 2015, performance counters
3134265 March 2016 cumulative update 6.0.9319.235 for Skype for Business Server 2015, Response Group Service
3134264 March 2016 cumulative update 6.0.9319.235 for Skype for Business Server 2015, Conferencing Attendant
3134262 March 2016 cumulative update 6.0.9319.235 for Skype for Business Server 2015, Web Components Server
3134260 March 2016 cumulative update 6.0.9319.235 for Skype for Business Server 2015, Front End server and Edge server
3134259 March 2016 cumulative update 6.0.9319.102 for Skype for Business Server 2015, core components
3124205 November 2015 cumulative update 6.0.9319.102 for Skype for Business Server 2015, Group Call Pickup
3097708 November 2015 cumulative update 6.0.9319.102 for Skype for Business Server 2015, Conferencing Server
3097649 November 2015 cumulative update 6.0.9319.102 for Skype for Business Server 2015 and Unified Communications Managed API 5.0 Runtime
3097647 November 2015 cumulative update 6.0.9319.102 for Skype for Business Server 2015, Enterprise Web App
3092727 November 2015 cumulative update 6.0.9319.102 for Skype for Business Server 2015, Shared Line Appearance
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