Microsoft 365 Underwent Two Day Outage, Outlook and Exchange Down



Within the last two days, Microsoft 365 online productivity suite succumbed to several outage issues. Reportedly, users lost access to their mailboxes and the process of receiving and sending emails was delayed by more than 3 hours.


Furthermore, e-mails went missing and users were exchanging multiple repeated e-mails at a time without their consent.


Microsoft Office 365 also known as Microsoft 365 or Office 365 is a line of subscription offerings by Microsoft which includes Windows 10, EMS (Enterprise Mobility + Security, which further includes Intune device management, analytics, and some Azure Active Directory capabilities). The overall idea by Microsoft is to aid customers with an easy and safe way of managing online productivity platform.


It comes as a disadvantage of an online platform that the issues which affect one of the services provided in the form of a cloud product will be faced by all users.


Referencing from tweets posted by official Microsoft account on 24th January, “We’re investigating an issue where users can’t access their mailboxes through multiple protocols. More details are published in the admin center under EX172491, available to your Microsoft 365 admin”

We’ve determined that a subset of Domain Controller infrastructure is unresponsive, resulting in user connection timeouts. We’re applying steps to mitigate the issue. More details can be found in the admin center published under EX172491.”


In response to the outages, Microsoft stated, “We’ve determined that there is higher than expected queuing within the authentication infrastructure, which may be the cause of impact. We’re working to identify the cause of these queues and determine steps to remediate impact.”


Two days later, users confirmed the removal of EX172491 issue altogether by Microsoft’s admin center.

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