Exchange Online outage causes email delays, 'Server busy' errors
Summary
An ongoing outage affecting Microsoft Exchange Online is causing delays in sending and receiving external emails, with users reporting "Server busy" errors. Microsoft is actively working to address and resolve the issue.
IFF Assessment
FOE
Service outages directly impact the availability of critical communication infrastructure, hindering normal business operations and potentially exposing systems to other threats.
Defender Context
Service outages like this highlight the importance of redundant communication channels and robust incident response plans. Defenders should monitor for any follow-on attacks that might exploit the disruption or investigate the root cause to prevent recurrence.