diff --git a/packages/agents-a365-runtime/src/agentic-authorization-service.ts b/packages/agents-a365-runtime/src/agentic-authorization-service.ts
index 6d09f550..e8cc7fc1 100644
--- a/packages/agents-a365-runtime/src/agentic-authorization-service.ts
+++ b/packages/agents-a365-runtime/src/agentic-authorization-service.ts
@@ -7,6 +7,6 @@ import { getMcpPlatformAuthenticationScope } from './environment-utils';
 export class AgenticAuthenticationService {
   public static async GetAgenticUserToken(authorization: Authorization, turnContext: TurnContext) {
     const scope = getMcpPlatformAuthenticationScope();
-    return (await authorization.exchangeToken(turnContext, 'agentic', { scopes: [scope] })).token || '';
+    return (await authorization.exchangeToken(turnContext, 'agentic', { scopes: scope })).token || '';
   }
 }
diff --git a/packages/agents-a365-runtime/src/environment-utils.ts b/packages/agents-a365-runtime/src/environment-utils.ts
index cb189515..9f18d5c6 100644
--- a/packages/agents-a365-runtime/src/environment-utils.ts
+++ b/packages/agents-a365-runtime/src/environment-utils.ts
@@ -67,6 +67,6 @@ export function isDevelopmentEnvironment(): boolean {
  *
  * @returns The MCP platform authentication scope from MCP_PLATFORM_AUTHENTICATION_SCOPE env var, defaults to production scope.
  */
-export function getMcpPlatformAuthenticationScope(): string {
-  return process.env.MCP_PLATFORM_AUTHENTICATION_SCOPE || PROD_MCP_PLATFORM_AUTHENTICATION_SCOPE;
+export function getMcpPlatformAuthenticationScope(): string[] {
+  return [process.env.MCP_PLATFORM_AUTHENTICATION_SCOPE || PROD_MCP_PLATFORM_AUTHENTICATION_SCOPE];
 }
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