This is what you need to participate trouble-free in an online PhD defense:

• a computer (desktop or laptop) and a headset (or earphones with a built-in microphone); a webcam is handy but not necessary.
• a stable internet connection
• open the link with internet browser Google Chrome (!)
• allow the application to use your microphone (can be turned off later
  It s definitely recommended to test the connection beforehand.
  

May we ask you not to leave the session during the defense ? Thank you.

In the calender item, you will find the registration link to attend the defense online.