This week adds new Copilot creation, governance, and usage reporting capabilities while requiring a Purview Graph API move for archive mailbox scenarios ahead of EWS retirement.

Microsoft is expanding Microsoft Graph API support for archive mailbox import/export and folder management as Exchange Web Services (EWS) in Exchange Online is retired. Organizations using EWS for archive mailbox access should plan and start migrating to Graph to avoid loss of functionality when EWS is disabled. Review any custom tools/workflows that touch archive mailboxes and update integrations accordingly.

• Covers archive mailbox data access scenarios previously handled via EWS
• Includes archive folder management and support for auto-expanding archives
• Migration recommended ahead of the EWS disablement timeline

Microsoft is introducing a new preview experience to build apps using natural-language guidance in Microsoft Copilot Cowork, with a similar experience coming to Microsoft Copilot Studio shortly after. This can change how makers create and publish apps and how organizational connectors/data are used under existing policies. Admins should review maker governance, connector policies, and environment strategy ahead of broader adoption.

• Conversational app drafting, refinement, preview/testing, then publish/share
• Apps can use organizational data via connectors allowed by your policies
• Copilot Cowork-built apps can be opened in other experiences (as supported)

Microsoft is rolling out enhancements to Copilot Cost Management and Copilot Credits governance to simplify administration and improve visibility and controls. Spending policies can now automatically apply to newly released Copilot services and agents, with the setting enabled by default. IT and finance admins should review policy behavior to ensure it matches your governance intent as new Copilot workloads appear.

• Auto-apply new services to spending policies (enabled by default)
• Improved consumption visibility and more flexible spending controls
• Rollout begins early September 2026

Microsoft is adding a prompt input directly to the Copilot button in Word, Excel, and PowerPoint, plus contextual prompt experiences when users select content. This changes the in-app Copilot entry point and may affect user guidance and training materials. Consider updating internal enablement content and helpdesk runbooks ahead of rollout.

• New in-context prompting when users select content
• GA rollout begins September 2026

Microsoft Edge for Business will add Rewrite, enabling users to draft and rephrase editable text from the right-click context menu. This introduces new end-user functionality that can affect writing workflows and policy expectations for AI-assisted content creation. Admins should confirm whether Copilot Chat is enabled as intended and update user communications accordingly.

• Access via highlight editable text > right-click > context menu
• GA rollout scheduled for end of September 2026 (timeline updated)

Microsoft is adding two Brand Kit template settings that let organizations control how Copilot creates presentations in PowerPoint. Brand managers can enforce strict adherence to approved layouts and provide instructions via speaker notes to guide Copilot output. Review template governance and brand standards to decide whether to enable these controls.

• Strict Mode prevents Copilot from creating new layouts or changing placeholders
• Notes Steering allows guidance via template speaker notes

Microsoft is adding a user-day export in the Copilot dashboard, providing de-identified usage metrics aggregated by user and day for the last 28 days. This enables more granular adoption analysis compared to the existing user-week export. Analytics/admin teams should assess how this changes reporting workflows and data governance practices.

• De-identified metrics, aggregated by user and day
• Includes 28 days of activity data
• Public preview timeline updated

Microsoft is retiring 161 Microsoft 365 training modules and selected articles from the Viva Learning catalog. If your organization links to these items for onboarding or training, content will disappear on the retirement timeline and may be replaced with refreshed alternatives. Review Viva Learning collections and internal documentation for impacted links.

• Retirement date communicated as September 21, 2026 (post updated)
• Replacement content will be published where available

Copilot features in Viva Glint are no longer available for Microsoft Entra cross-tenant guest users. This change avoids broken experiences for guests because underlying Copilot LLM services do not support cross-tenant guests. Organizations relying on guest participation should adjust expectations and communications for those users.

• Applies to B2B collaboration guest users
• Copilot features are hidden rather than showing errors

Microsoft 365 Copilot will support in-context PDF review on OneDrive for iOS via a selection-based Ask Copilot experience. Users can select text and ask Copilot to explain, summarize, translate, or answer questions. Consider updating mobile guidance and support documentation if Copilot is deployed to iOS users.

• GA for Worldwide, GCC, GCC High, DoD
• Rollout late September to late October 2026