defined by an identity shift and AI governance push. Microsoft is redirecting m365.cloud.microsoft to copilot.cloud.microsoft, urging admins to review firewall/proxy rules to avoid disruption, while simultaneously elevating trusted knowledge in Copilot Search via a new Authoritative content control for SharePoint sites. The Power Platform 2026 Release Wave 1 is closing its April-to-September rollout window, bringing new governance and AI features across Power Apps, Automate, and Power Pages, including a new unified Usage page in the Power Platform admin center. Innovation continues with Copilot Cowork’s natural-language app-building experience rolling out September 8-14 and soon in Copilot Studio. This is balanced by operational risk, as Microsoft investigated widespread Microsoft 365 Copilot access issues on September 11 under incident CP1470554 causing blank replies and sign-in failures.
Top Stories – September 13, 2026:
- SharePoint Online: New “Authoritative content” control in Microsoft 365 admin center (Roadmap 503553) will allow up to 100 SharePoint sites to carry more weight in Microsoft 365 Copilot Search results, scheduled for GA in September 2026. Security update KB5002908 for SharePoint Server Subscription Edition also notes SOAP feature deprecations starting September 2026.
- Power Automate: Part of Power Platform 2026 Release Wave 1 which runs April 2026 to September 2026, adding more automation and Copilot capabilities. Admins now get centralized adoption insights via new PPAC Usage page tracking flow runs.
- Power Apps: Continues to modernize with refreshed model-driven UI, faster search, and expanded AI features as part of Wave 1. Canvas apps performance improvements and data grid GA noted in September community updates.
- Power BI: Developer community September update live; August 2026 brought major Direct Lake enhancements. August features included new AI controls and Power BI reasoning in Copilot, per early September recap.
- Teams: Domain change from Teams web domain flagged as major change earlier this month, alongside M365 domain shift. Teams also gains 5 major AI upgrades in 2026 including Copilot Studio agents available in meetings and calls and expanded screen-content analysis when recording is enabled.
- Power Pages: Power Pages 2026 Release Wave 1 adds AI-assisted security and improved administration from Power Platform admin center Set up workspace, with capacity consumption reports and governance features.
- Copilot Chat: Microsoft is investigating widespread access issues under incident CP1470554, where users were unable to access or interact with Microsoft 365 Copilot across Word, Excel, PowerPoint, Outlook, Teams and dedicated chat. Separately, Copilot Chat now available at no extra cost inside Office apps via side panel and rolling to GCC tenants.
- Copilot Studio: The Copilot Cowork app-building experience rolls out between September 8 and September 14, while the Copilot Studio update will become available within a few weeks, enabling apps built from simple prompts with M365 Copilot license.
- Microsoft 365 / Office 365: Microsoft is changing the Microsoft 365 web domain, redirecting m365.cloud.microsoft to copilot.cloud.microsoft. IT admins urged to review network configurations immediately to avoid October disruptions. This is described as erasure of well-known brand in favor of AI-centric naming.
- Power Platform (Overall): New usage page in Power Platform admin center (PPAC) is in public preview, delivering a modern, centralized way to understand how Power Apps, Power Automate, and Copilot Studio are being used. Starting September 2026, new capabilities will publish continuously to the AI at Work roadmap instead of traditional Release Plans.
