Microsoft owes the responsibilty to ship a secure Exchange server product to downstream service providers or quickly remove that product as they are doing to their previous web browser from the market place.

Maybe Rackspace could install the patches Microsoft shipped? They got rooted on December 2.

> CrowdStrike researchers replicated the exploit method attack on Exchange systems that had not received the November 8, 2022 patch KB5019758, but could not replicate the attack on systems that had received that patch