Closure Summary: On Tuesday, June 24, 2014, at approximately 1:11 PM UTC, engineers received reports of an issue in which some customers were unable to access the Exchange Online service. Investigation determined that a portion of the networking infrastructure entered into a degraded state. Engineers made configuration changes on the affected capacity to remediate end-user impact. The issue was successfully fixed on Tuesday, June 24, 2014, at 9:50 PM UTC. A post-incident report will be available on the Service Health Dashboard within five business days.
Customer Impact: Affected customers were unable to access the Exchange Online service.
Incident Start Time: Tuesday, June 24, 2014, at 1:11 PM UTC
Incident End Time: Tuesday, June 24, 2014, at 9:50 PM UTC
Preliminary Root Cause: Due to configuration issues, a portion of networking capacity entered into a degraded state.
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