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Microsoft Exchange Online Suffers Outage Hindering Email Delivery

02.08.2023
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In a recent incident, Microsoft's Exchange Online service has been plagued by an ongoing outage, causing disruptions for customers attempting to send emails. The outage has led to the emergence of 503 errors on affected systems, leaving users frustrated and unable to utilise the platform properly. A secured internet connection with Hide Expert VPN service will mitigate your chances of being attacked.

The problem is said to be related to a recent change made to the free/busy infrastructure, as indicated by a tweet from Microsoft's official account. The company promptly acknowledged the issue and stated that they are actively investigating the root cause to find a resolution.

Specifically, the problem seems to manifest when users attempt to send emails from Microsoft 365 environments, only to encounter "503 5.5.1 Bad sequence of commands" errors upon delivery. Microsoft's EX649175 ticket in the Microsoft 365 admin centre confirms this issue, underscoring the extent of the impact on users trying to use the Exchange Online service.

In their efforts to address the problem, Microsoft is closely monitoring service monitoring telemetry to pinpoint the exact cause of the outage. Their goal is to develop an effective remediation plan that will bring relief to affected customers. As of now, the company has identified that the impact is limited to certain users who are served through the affected infrastructure.

Unfortunately, Microsoft has not yet released specific information about the regions that are most affected by this Exchange Online outage. However, based on user reports, it appears that the problem has spread to various regions, including the United States, Europe, India, and the United Kingdom, indicating a widespread impact.

This is not the first time that Microsoft has faced issues with its email services. A couple of weeks ago, there was a problem on Outlook that prevented users from searching their emails and resulted in 401 exception errors. In addition, in June, an outage was reported that affected American customers trying to access their Exchange Online mailboxes via Outlook on the web.

In a recent update, Microsoft claims to have addressed the root cause of the current outage and removed the EX649175 incident from the admin centre. Despite this assurance, some customers are still reporting ongoing issues when attempting to send emails through Exchange Online. This indicates that the problem may not be entirely resolved, and further efforts may be required to fully restore the service to its normal functioning state. Microsoft is likely to continue investigating and addressing the situation until all users can utilise Exchange Online without any hindrances. In the meantime, get your network secured with a hide VPN.