IT guy here. That's pretty fucking bad. Like.... really bad. Especially if it was combined with the solarwinds stuff a bit back. Exchange is emails, and internal email servers. They can basically get into all of the emails with admin level permissions with this exploit and likely already have at a bunch of places. If sysadmins are getting this fixed or contained right now, then they have a problem.

What does this effect? Mostly people/companies that run their own email servers internally. This can essentially open them up like Hillary's closet server.

IT guy here. That's pretty fucking bad. Like.... really bad. Especially if it was combined with the solarwinds stuff a bit back. Exchange is emails, and internal email servers. They can basically get into all of the emails with admin level permissions with this exploit and likely already have at a bunch of places. If sysadmins are getting this fixed or contained right now, then they have a problem.