On July 18, 2022, at ~9:55 AM EST, Microsoft communicated via tweet (@MSFT365status) that they were investigating an issue with users accessing or experiencing degraded functionality when using Exchange Online and outlook.com services.
For IT pros or system admins with Microsoft Admin cCnter access, the incident numbers for further details were EX401976 and OL401977.
We're investigating an issue with users accessing or experiencing degraded functionality when using Exchange Online and https://t.co/gk7xXJQBz5 services. More details are available in your admin center under EX401976 and OL401977.
— Microsoft 365 Status (@MSFT365Status) July 18, 2022
Less than an hour later later, Microsoft provided an update on the issues:
We suspect there may be unexpected network drops which are contributing to the degraded experience and are reviewing diagnostic logs to understand why. More details are available in your admin center under EX401976 and OL401977.
— Microsoft 365 Status (@MSFT365Status) July 18, 2022
And with their final message, Microsoft confirmed that the problem was resolved.
We identified a section of our network infrastructure that was performing below acceptable thresholds. We've rerouted connections to alternate infrastructure and that confirmed the issue is resolved. For more details, please check EX401976 and OL401977 in the admin center
— Microsoft 365 Status (@MSFT365Status) July 18, 2022
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