check before: 2026-05-31
Product:
Copilot, Entra, Microsoft 365 admin center, Microsoft 365 Copilot, Power Platform
Platform:
Online, World tenant
Status:
Change type:
New feature, User impact, Admin impact
Links:
Details:
Summary:
Microsoft Copilot Studio will add Mistral Medium 3.5 as an external AI model option, disabled by default and requiring admin opt-in. Available from May 2026, it offers more flexibility for agent orchestration, with existing governance and compliance controls maintained. No user impact unless enabled by admins.
Details:
[What and Why]
Microsoft Copilot Studio is introducing support for Mistral Medium 3.5. This update will provide customers with more flexibility to select models that best meet their business needs for agent orchestration and generative AI scenarios. External models such as Mistral remain disabled by default and require admin opt-in, ensuring administrators maintain control over model usage, data access, and compliance.
[Rollout Schedule]
Public Preview: Rollout begins at the end of May 2026.
[Impact on Your Organization]
Who is affected
Admins managing Microsoft Copilot Studio
Organizations building or managing agents in Microsoft Copilot Studio
Platforms/Services
Microsoft Copilot Studio
Microsoft admin center
Power Platform admin center
What will happen
Mistral Medium 3.5 will be available as a selectable model in Copilot Studio for supported environments.
The model will be included in the multi-model selection experience for agent orchestration.
External models, including Mistral, will be disabled by default.
Admins will need to enable external models at the tenant level before use.
Makers will be able to select Mistral Medium 3.5 after admin enablement.
Existing policies and governance controls will continue to apply.
There will be no impact to users or workflows unless admins enable external models.
[Action Required / Recommendations]
No action is required unless you plan to enable this feature.
If you choose to enable Mistral Medium 3.5:
Review external model configuration in your tenant
Enable external models in the Microsoft admin center. Review: Connect to xAI's models | Microsoft Learn
Configure permissions and governance in the Power Platform admin center. Review: Allow external language models for generative responses | Microsoft Learn
Communicate this change to makers using Copilot Studio.
Update internal governance or AI usage policies if applicable.
Learn more:
Connect to xAI's models | Microsoft 365 Copilot | Microsoft 365 | Microsoft Learn
Allow external language models for generative responses | Microsoft Learn
Mistral Medium 3.5 joins Copilot Studio model lineup for agents | Microsoft Copilot Blog
Select a primary AI model for your agent | Microsoft Copilot Studio | Microsoft Learn
[Compliance considerations]
QuestionAnswer
Does the change introduce or significantly modify AI or ML capabilities that interact with or provide access to customer data?Yes. This change will introduce Mistral Medium 3.5 as an external model option for generative scenarios in Copilot Studio, expanding AI and ML capabilities that can interact with customer data when enabled by administrators.
Does the change provide end users any new way of interacting with generative AI?Yes. This change will allow makers to select an additional third-party model, Mistral Medium 3.5, when building agents, providing a new option for generating AI responses.
Does the change add any integration to third party software products, and if so what?Yes. This change will integrate Mistral as a third-party external model provider within Microsoft Copilot Studio.
Does the change include an admin control and can it be controlled through Entra ID group membership?Yes. This change will include an admin-controlled opt-in setting at the tenant level to enable external models; however, control through Entra ID group membership is not specified.
Change Category:
XXXXXXX ... free basic plan only
Scope:
XXXXXXX ... free basic plan only
Release Phase:
Created:
2026-05-29
updated:
2026-05-29
Task Type
XXXXXXX ... free basic plan only
Docu to Check
XXXXXXX ... free basic plan only
MS Preperations
XXXXXXX ... free basic plan only
MS Urgency
XXXXXXX ... free basic plan only
MS workload name
XXXXXXX ... free basic plan only
summary for non-techies**
XXXXXXX ... free basic plan only
Direct effects for Operations**
Introduction of Mistral Medium 3.5
If Mistral Medium 3.5 is enabled without proper preparation, it may lead to unexpected behavior in agent orchestration, potentially causing disruptions in workflows.
- roles: Admins, Makers
- references: https://learn.microsoft.com/microsoft-365/copilot/connect-mistral-ai-models, https://learn.microsoft.com/microsoft-365/copilot/connect-to-ai-models
Compliance and Governance Risks
Enabling Mistral Medium 3.5 without reviewing governance policies may expose sensitive data to external AI models, leading to compliance violations.
- roles: Admins, Compliance Officers
- references: https://learn.microsoft.com/power-platform/admin/allow-llm-generative-responses, https://www.microsoft.com/microsoft-copilot/blog/copilot-studio/mistral-joins-copilot-studios-growing-lineup-of-model-providers/
User Experience Changes
If Mistral Medium 3.5 is enabled without user training, makers may struggle to effectively utilize the new model, leading to decreased productivity and user frustration.
- roles: Makers, End Users
- references: https://learn.microsoft.com/microsoft-copilot-studio/authoring-select-agent-model, https://learn.microsoft.com/microsoft-365/copilot/connect-to-ai-models
Configutation Options**
XXXXXXX ... paid membership only
Opportunities**
XXXXXXX ... free basic plan only
Potentional Risks**
XXXXXXX ... paid membership only
Data Protection**
XXXXXXX ... paid membership only
IT Security**
XXXXXXX ... paid membership only
Hypothetical Work Council Statement**
XXXXXXX ... paid membership only
DPIA Draft**
XXXXXXX ... paid membership only
explanation for non-techies**
XXXXXXX ... free basic plan only
** AI generated content. This information must be reviewed before use.
a free basic plan is required to see more details. Sign up here
A cloudsocut.one plan is required to see all the changed details. If you are already a customer, choose login.
If you are new to cloudscout.one please choose a plan.
Last updated 2 weeks ago ago
