Microsoft Exchange Online outage blocks access to mailboxes
Summary
Microsoft Exchange Online is experiencing a widespread outage that is preventing users from accessing their mailboxes and calendars. The company is actively working to resolve the issue.
IFF Assessment
FOE
An outage of a major email service directly impacts availability and can be exploited by attackers to disrupt operations or mask other malicious activities.
Defender Context
This incident highlights the critical dependency on cloud-based email services and the potential for widespread disruption. Defenders should have robust business continuity and disaster recovery plans in place, including offline communication channels and contingency for email service downtime.