Microsoft 365 Services Global Outage Continues

A global Microsoft 365 services outage continued to affect users around the world on Friday morning, leaving a trail of disruptions in its wake.

The issue began midday Thursday when a wide range of Microsoft email, cloud, and AI services were impacted, with the company documenting the full list of affected services as it struggled to contain the problem.

Microsoft has taken steps to mitigate the damage by extending email timeouts to 48 hours, helping preserve emails that would otherwise be lost during the extended disruptions.

Ciaran Martin, a former head of the UK's National Cyber Security Centre, described the outage as "one of the biggest outages of all time", and possibly even worse than previous high-profile incidents involving Amazon Web Services and CrowdStrike.

Businesses, hospitals, police departments, and schools were among those scrambling to work around the outage, with some facing critical consequences, such as doctors unable to send patients important updates on medication changes or follow-up care.

The financial sector was severely impacted as people were unable to make bank transfers due to a lack of verification codes.

Justice systems around the world also suffered disruptions, including the Supreme Court in the Philippines, which reported that its operations had been severely hindered by the outage. In Colorado, a sheriff's office found it difficult for individuals to post bond for prisoners' release on time.

The extent of the user base affected by the outage remains unclear, but Microsoft noted in January that there were over 450 million paid subscriptions to Microsoft 365 commercial services worldwide. This massive user base underscores the scale of the disruption caused by the outage.

Microsoft's efforts to mitigate the impact have been ongoing, with the company stating on a status page that it has found no evidence of malicious activity contributing to the incident.

As Microsoft continued to grapple with the aftermath of its global outage, the company acknowledged that it was still far from resolving the issue. The failed health checks had been identified as the root cause, and measures were being taken to prevent further server outages while new methods were validated.

Microsoft's efforts to restore service were hindered by a core process on affected servers becoming overwhelmed, leading to capacity loss. To mitigate this problem, the company was isolating a portion of its infrastructure, restarting affected components, and reintroducing traffic in small increments to test stability before applying the change more broadly.

The progress being made was short-lived, as some servers brought back online would again become unresponsive once they received traffic. This new challenge added to Microsoft's woes as it struggled to resolve the issue. The company's efforts were focused on finding a lasting solution rather than just patching over individual problems.

Microsoft's latest updates suggested that progress was being made in certain regions, with improvements seen in North America and sustained gains across much of Europe. However, recovery signals in Asia Pacific remained encouraging but incomplete, indicating that the issue still had a long way to go before it could be fully resolved.

Microsoft's efforts to mitigate the effects of its global outage continue, but some users may still face issues accessing their accounts or receiving emails in a timely manner.

The company's focus remains on stabilizing recovered infrastructure and completing mitigation in remaining impacted areas, which should help reduce delayed email queues and backlogs. This process is also aimed at validating service consistency across different connection methods.

As the situation slowly improves, users are beginning to share their experiences with the outage, highlighting the challenges they faced during this period. One Outlook user noted that outgoing messages seemed to send without issue, but incoming messages were received inconsistently. Meanwhile, Copilot and Microsoft 365 users expressed frustration at the slow restoration of access.

The outage has undoubtedly caused significant disruptions to businesses worldwide, with some offices likely feeling the full force of the impact. The total cost of this downtime is still unknown, but it's clear that many organizations have been severely affected.