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On January 18, 2021, at ~10:30 am UTC, Microsoft reported an issue that was affecting chat functionality within Microsoft Teams in the EMEA region.
Shortly after, Microsoft reported that they had redirected traffic and that monitoring was showing signs of recovery.
On January 15, 2021 at ~1:00 am UTC, Microsoft reported an issue affecting multiple Microsoft 365 services .
Shortly after, Microsoft reported that they were actively investigating an issue that may be resulting in service functionality degradation for multiple Microsoft 365 services.
On January 12, 2021 at ~4:45 pm UTC, Microsoft reported an issue with SharePoint and OneDrive for Business and Microsoft Teams.
Shortly after, Microsoft confirmed that these issues were part of the same problem and that services were recovering. They were still attempting to discover the root cause of the problem and informed users that more information could be found in the admin center.
On January 5, 2021, at ~3:00 pm UTC, Microsoft reported an issue affecting users in the UK that may be preventing them from accessing the Microsoft 365 admin center.
Roughly 2 hours later, they confirmed that a portion of their processing infrastructure wasn't handling requests as expected and that they were repairing the problem to restore service access for affected users.
On December 14, 2020 at ~7:45 am UTC, Microsoft reported an issue affecting users throughout Europe that may be preventing them from accessing Microsoft 365 services.
Shortly after, Microsoft reported that they had identified an issue with components which facilitate authentication requests. They also reported that they had performed optimizations and rerouted user requests in an effort to remediate impact.
On December 11, 2020, at ~2:00 pm UTC, Microsoft reported an issue affecting users in the United Kingdom (UK) that may be preventing those users from accessing Microsoft 365 services.
Shortly after, Microsoft also reported that they had been receiving reports that some users outside of the UK may also be experiencing the issue.
On December 7, 2020, at ~3:00 pm UTC, Microsoft reported an issue with call quality within Microsoft Teams and that more details would be reported shortly.
On December 2, 2020 at ~4:00pm UTC, Microsoft reported an issue that was intermittently preventing some users from accessing files within Teams. They reported they were working to identify the cause of the issue and that more information would be available soon.
On November 30th, 2020 at ~4:30pm UTC, Microsoft reported an outage that was causing a number of users to see delays or timeouts when accessing the Microsoft 365 Admin Center or admin functions therein.
On November 10th, 2020 at ~5:15pm UTC, Microsoft reported an outage preventing some users from accessing Outlook.com and that additional information would be provided shortly.
Many confirmed they were unable to access Outlook from their mobile phones or laptops.