Microsoft confirms widespread Exchange Online connectivity problems as businesses and organizations report difficulties sending and receiving emails. Presence News also experienced an internal communication issue.
A widespread Microsoft Outlook and Microsoft 365 outage disrupted email communications Thursday, November 12, 2026, leaving thousands of users unable to access their inboxes, send messages or receive important business communications.
Microsoft confirmed that it was investigating problems affecting Exchange Online, the company’s cloud-based email service used by businesses and organizations worldwide.
The disruption was initially reported across the Americas, with Microsoft later warning that connectivity problems could affect customers in other regions.
The outage has created challenges for businesses, newsrooms and organizations that rely on Microsoft services for daily communication.
Presence News Experiences Email Communication Issues
Presence News experienced a communication issue Thursday when an internal email did not successfully go through as expected.
The newsroom also observed reports from other organizations experiencing similar difficulties.
One organization posted a public notice stating that it had been unable to send or receive emails since approximately 12:30 p.m. on November 12, apologizing to customers for the inconvenience.
The experience highlights how disruptions involving major email providers can affect routine business operations, including internal communications, customer correspondence and time-sensitive messages.
While Presence News identified an email communication problem during the outage, the precise technical cause of that individual delivery failure has not been independently established.
Microsoft Confirms Exchange Online Problems
Microsoft acknowledged the disruption through its official Microsoft 365 Status communications on Thursday.
The company reported that customers were experiencing difficulty accessing Exchange Online mailboxes through multiple connection methods.
Microsoft directed administrators to incident reference EX1550543 in the Microsoft 365 admin center for additional information.
In subsequent updates, Microsoft explained that some of its servers had unexpectedly become unavailable, placing additional pressure on the remaining infrastructure.
The company indicated that the increased load was not simply the result of unusually high customer traffic.
Microsoft began redistributing connections across its infrastructure, restarting affected servers and taking other measures to restore service.
The company also warned that the disruption could affect Microsoft 365 connectivity beyond the Americas.
Outlook, Teams and Other Microsoft Services Affected
The outage extended beyond the Outlook email application.
Users reported problems involving Microsoft Teams, Microsoft 365 and other services, with potential disruptions also affecting SharePoint Online, Microsoft 365 Copilot and Microsoft Defender XDR.
According to outage-monitoring website Downdetector, reports involving Outlook surged into the tens of thousands Thursday afternoon, with nearly 130,000 reports recorded shortly after 1 p.m. Eastern Time.
These figures represent user-submitted outage reports rather than the confirmed number of affected customers.
For businesses relying heavily on Microsoft products, even a temporary interruption can disrupt customer service, scheduling, document collaboration and employee productivity.
When Will Microsoft Outlook Be Working Again?
As of Thursday afternoon, Microsoft was actively working to restore affected services.
The company had not provided a definitive restoration time, and the extent of the remaining disruption could vary depending on the service, region and individual organization.
Users experiencing issues should avoid assuming that emails have been successfully delivered simply because they appear in a sent folder or because an email application remains open.
For urgent communications, businesses may need to temporarily use telephone calls, text messages or alternative communication platforms.
Microsoft 365 business administrators can review the official service-health dashboard for updates specific to their organization.
How to Check Microsoft’s Official Outage Updates
Microsoft customers can follow the company’s official service-health communications for the latest information.
Official sources:
The Microsoft 365 admin center lists the Exchange Online incident under reference EX1550543.
A Reminder of Businesses’ Dependence on Cloud Communications
Thursday’s outage demonstrates how dependent modern workplaces have become on cloud-based email and productivity platforms.
For small businesses, media organizations and larger companies alike, interruptions to email services can delay essential communications and create uncertainty about whether important messages have been received.
Presence News will continue monitoring Microsoft’s official updates as the company works to resolve the disruption.