The interruption to support ticket processing by email was caused by Microsoft 365 incident MO1550821, which affected Exchange Online email delivery and API connectivity. During the outage, Jira was unable to reliably process incoming support emails, although the customer portal and telephone support remained available.
Microsoft has restored the affected Exchange Online functionality, and we have confirmed that Jira email processing has recovered. Some messages received during the incident required manual ticket updates. All support services have returned to normal operation.