For Xbox One, check the solutions as below--
1. Disconnect the headset or unplug the headset cable from the bottom of the controller, and then reconnect it firmly.
2. Re-connect EKSA headset to your Xbox One controller via 3.5mm cable (Ensure the microphone is NOT ON MUTE)
3. Check Xbox One settings--go to System > Settings> Kinect & devices > Devices & accessories
Then scroll down to Audio > Headset Mic on, and then just adjust your audio options.