Leitner : - Skype for Business if Lync Mode is enabled. What is Lync Mode? Check out this article! Sennheiser : - You can always go with the ML version of any Sennheiser item and that should guarantee call control with Skype for Business aka Microsoft Lync. Note: These are subject to change (constantly), so here is a link to the complete, current list. Softphones that have call control with Headsetup Pro/EPOS Connect This applies to wireless, Bluetooth, and the corded USB headsets that have the call control button. Transfer to Product Support for this process, as a program will need to be downloaded to get this to work. • 3CX Phone client v15 or higher** (we need to download 3CX Plugin for this one) • 3CX Web Client v16 • Amazon Connect • Avaya Equinox v3.2.2.2 or higher • Avaya one-X Agent 2.5.58020.0 or higher • Avaya one-X Communicator v5.2.0.14 or higher • Avaya Communicator 2.1.0.69 or higher • Cisco CUCI Lync v11.6 or higher • Cisco IP Communicator version 8.6.2 or higher • Coun…