[German]A few hours ago, there was a worldwide outage of the Microsoft cloud services Xbox Live, Teams, Office 365, OneDrive and Bing. A DNS resolution error was probably the problem. The problem seems to be solved at the moment..
The fault probably occurred during the night (around midnight German time). On Twitter, there is a sequence of tweets from Microsoft people with information about this.
Here the tweets from Microsoft 365 Status (@MSFT365Status) as text, send 7 hours ago (April 1, 2021, no Aprils fool joke):
We're investigating an issue in which users may be unable to access Microsoft 365 services and features. We'll provide additional information as soon as possible.
Engineers are fully engaged and investigating this issue. Access to both http://status.office.com and the Service Health Dashboard may be affected by this event.
We're investigating a potential DNS issue and are evaluating our mitigation options.
Microsoft rerouted traffic to our resilient DNS capabilities and are seeing improvement in service availability. We are continuing to investigate the cause of the DNS issue. The next update will be provided in 60 minutes or as events warrant.
As services begin to recover, admins can access additional details about this event in the admin center under MO248163.
We rerouted traffic to our resilient DNS capabilities and are seeing improvement in service availability. We're managing multiple workstreams to validate recovery and apply necessary mitigation steps to ensure complete network recovery.
A good five hours ago, confirmations followed that the problem had been fixed:
We have confirmed that the underlying DNS outage has been mitigated. Currently we're validating the recovery of the downstream Microsoft 365 services. Additional details can be found on http://status.office.com or MO248163 in your admin center.
We're continuing to mitigate residual impact experienced by SharePoint Online. In parallel, we're continually monitoring all Microsoft 365 services to ensure that they remain in a healthy state. Additional details can be found on http://status.office.com or via MO248163.
We've successfully resolved the issue that was causing residual impact for SharePoint Online and we've confirmed that all Microsoft 365 services have returned to a healthy state. Additional details can be found via MO248163.
At allestörungen.de, there was only a minor peak during the night with regard to Microsoft Office 365 – probably because people in Germany were in bed and asleep.
Office 365-Störung 1.4.2021
Globally, however, this has probably put some Microsoft Cloud customers out of business – the following tweet hints at that:
Web sites like The Register or windowscentral has covered that.
