Adriana Lecouvreur will be broadcast live in Vienna (and other cities in Europe) on February 22 starting 6:30pm (the broadcast starts 30 minutes before the performance) on staatsoperlive.com. There's a small fee to be paid, 14 euro/performance. The purchase must be made before the beginning of the streaming.
Pay attention to the different time zones for broadcasting. There are countries where the broadcast has a delay, such as Bucharest (recorded broadcast one day later, Feb 23 at 7pm local time)
For more info, check out Staatsoper live