CISA has issued an emergency directive in response to Midnight Blizzard, or Cozy Bear, a Russian threat actor targeting Microsoft email accounts. The group is extracting information to access Microsoft customer systems. Strict security measures, including strong passwords and multi-factor authentication, are strongly recommended by CISA for all organizations (Microsoft included).
I think that zero trust is not enough.
I think that you need to assume that you are going to be compromised and put processes and procedures in place before that happens to ensure business continuity.
im approaching zero trust as assume everything is compromised until you verify it is not