The outages were most highly concentrated in the New York, Chicago and Los Angeles areas, per the Downdetector reports.
Users also flooded social media site X complaining about their inability to access their Outlook emails, prompting concerns of a global Microsoft outage.
Microsoft reported on its service health update page that the company said, "Everything is up and running."
In a Microsoft 365 Status update posted on X, the company said "it confirmed that service was restored."