Clouddienst: Weltweite Störung bei Microsoft Outlook legt E-Mail lahm

A widespread outage affecting Microsoft impacted email traffic for millions of users worldwide on Monday evening. Both Microsoft 365 corporate customers and private Outlook users were affected, according to the US software giant's confirmation on its official status pages. Microsoft confirmed that the issues encompassed login difficulties, as well as receiving and sending emails.

Numerous users also reported that mailboxes stopped syncing, and the application froze. The problem stems from cloud infrastructure issues, specifically within Exchange Online. A fault in a central authentication and connection component prevents proper access to the mail servers. The incident is being tracked internally under the designation EX1464935.

Microsoft's engineers have initiated corrective measures and are gradually rolling out an update to affected servers to restore the services. Users are advised not to make any changes and not to reinstall the software, as the fault is purely server-side. Additionally, remaining emails in the inbox should not be manually resent multiple times to prevent duplicate deliveries.