Thousands of users reported issues or outages with Outlook and other Microsoft services on Saturday afternoon.

A heat map on the website Downdetector showed that Buffalo, Toronto, and New York City were among the hot spots for service outages.

Microsoft Outlook, 365 and other services crashed Saturday, affecting tens of thousands in the United States and millions globally before services were restored in less than an hour.

We’ve identified a potential cause of impact and have reverted the suspected code to alleviate impact,” Microsoft said in the posts, which were published by a company page

The disruption, which has been resolved at the time of writing, was mainly contained to the New York, Chicago, and Los Angeles areas.

Microsoft Office 365 investigated an outage Saturday that left tens of thousands of users unable to access Outlook, according to an outage tracker. "We're investigating an issue in which users may be unable to access Outlook features and services,

Tens of thousands of people were briefly unable to send or receive emails on Saturday afternoon after Microsoft Outlook faced a widespread service disruption.