Microsoft 365 Outage: CIOs Should Verify Recovery Across Workflows and Security Controls, Says Infotech

The Microsoft 365 outage has shown how email dependencies can interrupt business processes even when other functions remain available. Infotech's research note, Microsoft 365 Outage: Immediate Actions for CIOs, covers recovery validation, potential security coverage gaps, and continuity measures for prolonged cloud outages.

ARLINGTON, Va., Nov. 13, 2026 /CNW/ -- In response to the Microsoft 365 outage that began on November 12, Infotech, a global research and API-driven advisory firm, is recommending that CIOs verify the recovery of business-critical workflows, integrations, and security controls before declaring normal operations restored. The firm's new research note, Microsoft 365 Outage: Immediate Actions for CIOs, also advises organizations to document service disruptions and preserve evidence for potential service level agreement claims.

The outage began Thursday afternoon with Exchange Online mailbox access failures in the Americas and affected functions in Teams, SharePoint, Copilot, and Defender. Thursday night, servers that had returned to service failed again under load, and Microsoft added capacity and began rolling back a recent network change. According to the note's midday ET update on November 13, availability was improving, but intermittent issues persisted, and Microsoft had not given a restoration time. At that point, Microsoft had reported no evidence of malicious activity, and the root cause was still under investigation.

"CIOs need a clear basis for telling the business it can return to normal operations," says Kate Wood, AVP of Research Development at Infotech. "That means knowing which critical processes have been tested, where security coverage still needs checking, and which teams must continue using workarounds. Executive updates should make those outstanding issues visible so that business teams can plan their next steps."

The examples summarized in Infotech's note show contingency plans holding where a manual route existed and stalling where email was the only channel. According to news reports, disruptions included delays to patient referrals and court communications, while some organizations maintained critical operations using other systems or manual procedures. Core Teams messaging and meetings and direct SharePoint file access also remained largely operational, reinforcing the need to assess the specific functions and dependencies supporting each business process.

Recommended Actions for Microsoft 365 Response and Recovery
Infotech advises CIOs to focus on maintaining operations and documenting impacts. IT teams should log unresolved issues and failed workarounds throughout recovery, giving executives a clear view of operating status and creating a record to guide improvements to continuity plans.

The firm's Microsoft 365 Outage: Immediate Actions for CIOs research note groups its recommendations as follows:

• Sustain critical operations. A Microsoft service-health notification does not mean every business process has recovered. Maintain alternative communications and access to essential information independently of Microsoft 365, verify that business-critical workflows, integrations, and queued transactions resume correctly, and document continuity gaps exposed by the outage.

• Reinforce cybersecurity practices. During previous large-scale outages, threat actors have commonly impersonated Microsoft support staff and promised to restore access. Warn employees about phishing emails, credential-harvesting attempts, and deepfake voice and video calls during the disruption and recovery. Confirm that affected security monitoring and policy enforcement functions have recovered, including service-related logging and policies, and review potential coverage gaps during the outage.

• Prepare for service level agreement claims. Service credits are not automatic, and SLA claims generally require evidence of customer-specific impact, not just confirmation of a widespread outage. Organizations should preserve outage evidence, such as service-health advisories, document actual disruption, and have vendor management and legal teams review applicable agreements to determine credit eligibility, evidence requirements, and submission deadlines.

For longer-term readiness, Infotech emphasizes testing continuity procedures against prolonged outages affecting multiple cloud services. Organizations should identify where reliance on a single cloud environment creates shared points of failure and establish independent continuity options where the business impact justifies them.

Additional resources include the firm's Develop a Business Continuity Plan, Create a Right-Sized Disaster Recovery Plan, and IT Communications Research Center.

Download the complete Microsoft 365 Outage: Immediate Actions for CIOs note to learn more. For exclusive media commentary from Infotech's experts, please contact [email protected].

SOURCE Infotech