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What is Microsoft Exchange? The cloud tool behind Microsoft Outlook issues.

Microsoft has reported problems with Microsoft Exchange Online, which would explain why so many users are reporting Outlook problems.

What is Microsoft Exchange? The cloud tool behind Microsoft Outlook issues.

On Thursday, Microsoft's widely-used suite of enterprise products, known as Microsoft 365, which includes Outlook, Teams, and Copilot, experienced a significant outage. While over 100,000 users reported difficulties accessing Microsoft Outlook and Microsoft 365 on DownDetector, Microsoft attributes the problems to a cloud tool called Microsoft Exchange.

Microsoft Exchange is the backend cloud tool responsible for sending data updates to Outlook. It is essentially the server that stores the actual data, manages the mail flow, synchronizes the data to services like Outlook, and manages account security policies. In simple terms, Outlook is the front end interface, while Exchange is the back end infrastructure.

For most users, this distinction is inconsequential, as the end result is the same: users are unable to access their email, calendar, or messages. Microsoft has been providing updates on the situation via its X platform (now known as Twitter), but as of now, the company has not responded to inquiries from Mashable regarding the outage.

Written by urgent.news from Mashable's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.

Also reported by 1 other outlet

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