Microsoft Exchange hack caused by China, US and allies say

WASHINGTON (AP) — The Biden administration and Western allies formally blamed China on Monday for a massive hack of Microsoft Exchange email server software and accused Beijing of working with criminal hackers in ransomware attacks and other cyber operations.

The announcements, though not accompanied by sanctions against the Chinese government, were intended as a forceful condemnation of activities a senior Biden administration official described as part of a “pattern of irresponsible behavior in cyberspace...