FSB, oops, FBI will fix you up! No worries, it not opt-in. I guess since Microsoft got to play law enforcement with NoIP, turnabout's fair play!...the Justice Department announced that a Houston court authorized a FBI "copy and remove" operation to remove malicious web shells, which allow remote access to a server, from "hundreds of vulnerable computers in the United States that were running on-premise versions of Exchange.
https://seekingalpha.com/news/3681694-f ... or-hackers