Priority notifications for Teams grants users the ability to continually send notifications that repeat every two minutes for up to 20 minutes on all messages marked as urgent. Originally, priority notifications were available as a promotion to all Teams users until 1 April 2020, but this has been extended until the second half of 2020 to enable all users to connect urgently with their colleagues during the coronavirus pandemic.

Find the announcement here: https://bit.ly/2V8flm5, and learn how to use priority notifications here: https://bit.ly/3cc9lOL.