Merge branch 'main' into kwekua-flex-routing

Author: rjagiewich

copilot/TOC.yml

@@ -108,6 +108,8 @@ items:
     items:
     - name: Anthropic as a subprocessor for Microsoft Online Services
       href: connect-to-ai-subprocessor.md
+    - name: Copilot in Microsoft 365 apps with Anthropic models
+      href: copilot-anthropic-apps.md      
     - name: Connect to xAI's models  
       href: connect-to-ai-models.md
     - name: Deploy Microsoft 365 Copilot app

copilot/copilot-anthropic-apps.md

@@ -0,0 +1,60 @@
+---
+title: "Copilot in Microsoft 365 apps with Anthropic models"
+ms.author: kwekua
+author: kwekuako
+ms.update-cycle: 180-days
+manager: scotv
+ms.date: 03/27/2026
+audience: Admin
+ms.topic: how-to
+ms.service: microsoft-365-copilot
+ms.localizationpriority: medium
+ms.collection:
+- scotvorg
+- m365copilot
+- magic-ai-copilot
+- essentials-overview
+- operations-pod
+- OtherAILLMs
+appliesto:
+- ✅ Microsoft 365 Copilot
+description: "Learn about the new toggle for Microsoft 365 apps for Anthropic in Europe."
+---
+
+# Copilot in Microsoft 365 apps with Anthropic models
+
+To provide additional flexibility in model choice for customers in the European Union (EU), European Free Trade Association (EFTA), and United Kingdom (UK), Microsoft 365 Copilot includes an admin setting that enables the use of Anthropic models in Copilot experiences across Word, Excel, and PowerPoint.
+
+This setting allows Microsoft 365 Copilot in supported Microsoft 365 apps to use Anthropic models by default when generating or refining content.
+
+## Anthropic model availability in Microsoft 365 apps
+
+As the admin, you can manage the Anthropic model setting in the Microsoft 365 admin center. When this setting is turned on, Anthropic models are available for use in Copilot experiences across:
+
+- Microsoft Excel  
+- Microsoft PowerPoint  
+- Microsoft Word *(support for Anthropic models will be added in summer, 2026)*
+
+This setting applies only to Copilot experiences within these apps and does not affect Anthropic model usage in other Microsoft 365 Copilot features or services. It is separate from the [global Anthropic subprocessor setting in Microsoft 365](connect-to-ai-subprocessor.md). Changes to this setting do not modify global subprocessor configurations.
+
+This setting is on by default for tenants in the EU, EFTA, and UK that were created after March 25, 2026. For tenants in the EU, EFTA and UK that existed before March 25, 2026, check the [Message Center](https://go.microsoft.com/fwlink/p/?linkid=2070717) for details on your tenant’s default setting.
+
+All tenant administrators are encouraged to check their tenant’s setting to make sure it aligns with their company's requirements.
+
+## Data processing and the EU Data Boundary
+
+When Anthropic models are used in Copilot experiences in Word, Excel, or PowerPoint, data processing for these models occurs outside of the Microsoft EU Data Boundary (EUDB).
+
+[Anthropic operates as a Microsoft subprocessor](connect-to-ai-subprocessor.md) and is subject to Microsoft Product Terms and the Microsoft Data Protection Addendum (DPA).
+
+## Manage the setting in the Microsoft 365 admin center
+
+1. Sign in to the Microsoft 365 admin center as an administrator assigned the **AI Administrator** role.  
+2. Go to **Copilot** -> **Settings** -> **View All** -> **AI providers operating as Microsoft subprocessors**.
+
+    :::image type="content" source="media/ai-providers-operating-as-subprocessors.png" alt-text="Screenshot  of the AI providers operating as Microsoft subprocessors page with All users selected" lightbox="media/ai-providers-operating-as-subprocessors.png":::
+
+3. Confirm the correct setting for your organization.
+
+> [!NOTE]
+> Support for Anthropic models in Microsoft 365 apps varies based on how the AI providers operating as Microsoft subprocessors setting is scoped in your organization. When the setting is enabled for **All users**, Anthropic model use in supported apps is unavailable and can't be changed. When the setting is scoped to **No users**, Enterprise, public sector, and EDU tenants have Anthropic model use in apps turned off by default but can enable it, while non‑Enterprise tenants have Anthropic model use turned on by default but can disable it. This allows admins to control whether Anthropic model processing can be flexibly routed within the EU. This setting applies only to Copilot experiences within supported apps and doesn't affect Anthropic model usage in other Microsoft 365 Copilot features or services. For more information, see [Flex routing (EU and EFTA)](/copilot/microsoft-365/copilot-flex-routing).