U-M voluntarily disconnects internet to address security concern (not-OT?)

[This may be walking a fine OT line but seems relevant, given “the University of Michigan” and all]
 

LINK

Apparently, U-M’s “Information Assurance” (i.e., cybersecurity) team found sufficiently concerning and credible threats to its network on Sunday that it quickly took the whole thing offline that day. Some critical services (canvas, zoom, dropbox, adobe cloud, etc.) have returned but the rest remain disconnected to give the team its best chance to quickly address the issue.