diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index 88199773fe..655e981d98 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -190,6 +190,19 @@ microsoft-authentication-library-for-js/
 - Write unit tests for new functionality and bug fixes
 - Document all public API changes
 
+### Instance Aware Flow Restrictions
+
+**IMPORTANT: The instance aware flow is not supported and should NEVER be suggested or used with this library**
+
+- **Do not suggest** the `instanceAware` configuration option or `instance_aware` query parameter
+- **Do not recommend** instance aware flow in code examples, documentation, or solutions
+- If asked about multi-cloud or cloud instance scenarios, provide alternative solutions that do not involve instance aware flow
+
+**What to Suggest Instead:**
+- Standard MSAL authentication flows without instance aware configuration
+- Proper authority configuration for the specific cloud environment the application targets
+- Separate application registrations for different cloud environments if needed
+
 ### Telemetry and Performance Monitoring
 
 **IMPORTANT: Add telemetry for any new operations or significant code paths in msal-browser and msal-common where observability would be useful.**