It appears the issue is focused around Exchange Online, and Microsoft says more details are available to Outlook admins under the EX401976 and OL401977 codes. Although the issue doesnt affect all users, its still a significant outage. Down Detector , which tracks outages for online services, has received thousands of user reports centered around Outlook since around 6am PT. Microsoft says it suspects network drops are contributing to the outage, and the team is currently working on a fix for...

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