Microsoft Stock Falls as Outage Tests Its Copilot Push Moz Farooque ACCA Fri, November 13, 2026 at 9:11 AM EST 2 min read MSFT -1.72% Trade MSFT on Coinbase Trading disclosure Trading disclosure The above button links to Coinbase. Yahoo Finance is not a broker-dealer or investment adviser and does not offer securities or cryptocurrencies for sale or facilitate trading. Coinbase pays us for certain activity generated through this link. Prices displayed are informational.
Microsoft (NASDAQ:MSFT) shares fell 2.5% in Friday premarket trading, according to Seeking Alpha, as a global Microsoft 365 outage disrupted Outlook, parts of Teams and Copilot.
The disruption stretched beyond 12 hours, exposing how heavily businesses rely on a single software suite for email, meetings and AI tools. That reliance also makes reliability a selling point as Microsoft asks customers to pay for more of its services.
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Microsoft reported early signs of stabilization Friday after applying fixes more broadly, Reuters reported. A Microsoft service advisory said a process that establishes secure connections became overwhelmed, leaving affected servers unable to handle requests. The company said it had seen no indication of malicious activity.
The disruption reached government agencies in Australia, Japan and the United States. U.S. electric truck maker Workhorse postponed its earnings release to Nov. 16, while European exchange operator Euronext reported email problems for its listings teams. OpenAI and Anthropic also reported trouble with tools that connect to Microsoft services, illustrating how an outage can reach beyond Microsoft's own apps.
Microsoft 365 commercial cloud revenue grew 17% year over year in the September quarter. Management said premium offerings, including Copilot, helped lift revenue per user.
Microsoft's incident review is the next test. Details on why the servers failed under load and what Microsoft is changing to prevent a repeat will help customers assess whether they need backup systems.
On the next earnings call, watch for any disclosure of service credits, changes in commercial subscription growth and signs that customers are slowing paid Copilot deployments. A sustained recovery could limit the immediate financial impact. Repeated outages could make it harder for Microsoft to sell premium upgrades, even if customers keep their core subscriptions.
