Microsoft said on November 13 that a nearly two-day global outage was gradually being repaired, with improved availability and mail delivery for Outlook and other Microsoft 365 services, although some users still faced intermittent connection problems. cnBeta reported that the disruption affected Outlook, Teams, Copilot, Word, Excel, PowerPoint, SharePoint and OneDrive worldwide, with OpenAI and Anthropic also encountering Microsoft 365 connection issues. Microsoft attributed the main impact to Exchange Online infrastructure and abnormal server behavior, while saying it had found no evidence of a cyberattack.