An Internal Meeting has now become more productive with newly added video and audio call features in the Chatbox.
Go to Message Section through top bar then open message box of another user.
The two additional buttons have been added for video and audio calls as you can see in the below figure.
Users can maximize the screen using the button given on the right side of the audio call. 
After clicking on maximize button, the Call screen will appear on your page. There is another way to reach the call screen. It is so simple. Just open discuss app directly and you will be able to use this feature.
Afterward, you will find a Start Meeting button, which leads you to start a new meeting after
clicking on it. Additionally, users are facilitated with an option to manage Microphone, Deafen, Screen sharing, and so on.
Moreover, Users can add new participants using Add button given in the upper right corner. In addition, users can see a list of online participants. They are allowed to invite other people through the invitation link. You can view the image given below.
Audio & Video Call Features in the Chat Box