Microsoft has resolved an issue causing a major outage affecting its popular Microsoft 365 services, including Outlook and Exchange Online. The problem was related to a coding error, which impacted authentication functionality. The weekend's disruption had significant implications for users relying on these services. Many individuals experienced difficulties accessing their emails and other critical work applications. Microsoft acknowledged the impact of the issue and promptly began working on a fix. In resolving the matter, Microsoft has ensured that the affected services are now operational and stable. The company has assured customers that measures are in place to prevent similar issues from occurring in the future.