Microsoft 365 Alert : Service Degradation – Exchange Online – Users opening some website links are incorrectly informed by Safe Links that they are classified as malicious – RESOLVED

28/03/2022 08:57:00 AM (BST)

NHSmail Reference : INC27835884

Microsoft Reference : EX347915

Issue Status: RESTORED

Issue Description: Users opening some website links are incorrectly informed by Safe Links that they are classified as malicious.

Scope of Impact : Impact is specific to users who are served through the affected infrastructure.

Final Update: 28/03/2022 12:29:00 PM – After a period of extended monitoring, Microsoft have confirmed that impact has been remediated. They have identified that a recent configuration change caused Safe Links to perform unexpectedly.

Root cause : A recent configuration change caused Safe Links to perform unexpectedly.

Next steps : Microsoft are reviewing their configuration procedures to find ways to prevent this problem from happening again.