The Yealink SIP-T42S-SFB comes pre-loaded with Skype for Business firmware, making integration as simple as can be. Supporting many Microsoft features and BToE (Better Together over Ethernet) integration, this phone will meet and exceed all of your needs. 
 
Yealink SIP-T42S-Skype for Business Edition Features
 
2.7" 192x64-pixel graphical LCD with backlight
Opus* codec support
USB 2.0
T4S Auto-P template unified
T4S firmware unified
Up to 12 SIP accounts
Dual-port Gigabit Ethernet
PoE support
Paperless label design
Headset, EHS support
Integrated stand with 2 adjustable angles
Wall mountable