> This week we are continuing notifications to customers who corresponded with Microsoft corporate email accounts that were exfiltrated by the Midnight Blizzard

> This week we are continuing notifications to customers who corresponded with Microsoft corporate email accounts that were exfiltrated by the Midnight Blizzard threat actor My interpretation is that they are notifying customers who corresponded with compromised Microsoft accounts, not that they are saying customer-use email systems were compromised. Do you read that differently?