diff --git a/change/@microsoft-teams-js-fc4a8f34-92ca-48dc-9c74-c84d8eed6a89.json b/change/@microsoft-teams-js-fc4a8f34-92ca-48dc-9c74-c84d8eed6a89.json
new file mode 100644
index 0000000000..5b8b7b14c6
--- /dev/null
+++ b/change/@microsoft-teams-js-fc4a8f34-92ca-48dc-9c74-c84d8eed6a89.json
@@ -0,0 +1,7 @@
+{
+  "type": "minor",
+  "comment": "Added optional `FeatureSet` field to `AppEligibilityInformation` interface",
+  "packageName": "@microsoft/teams-js",
+  "email": "email not defined",
+  "dependentChangeType": "patch"
+}
diff --git a/packages/teams-js/src/private/copilot/eligibility.ts b/packages/teams-js/src/private/copilot/eligibility.ts
index e42d56b719..50791d0a52 100644
--- a/packages/teams-js/src/private/copilot/eligibility.ts
+++ b/packages/teams-js/src/private/copilot/eligibility.ts
@@ -80,7 +80,9 @@ function isEligibilityInfoValid(eligibilityInfo: AppEligibilityInformation): boo
     eligibilityInfo.userClassification === undefined ||
     eligibilityInfo.isCopilotEligible === undefined ||
     eligibilityInfo.isCopilotEnabledRegion === undefined ||
-    eligibilityInfo.isOptedOutByAdmin === undefined
+    eligibilityInfo.isOptedOutByAdmin === undefined ||
+    (eligibilityInfo.featureSet &&
+      (eligibilityInfo.featureSet.serverFeatures === undefined || eligibilityInfo.featureSet.uxFeatures === undefined))
   ) {
     return false;
   }
diff --git a/packages/teams-js/src/public/interfaces.ts b/packages/teams-js/src/public/interfaces.ts
index ab607a1864..8f10629bb5 100644
--- a/packages/teams-js/src/public/interfaces.ts
+++ b/packages/teams-js/src/public/interfaces.ts
@@ -1132,6 +1132,11 @@ export interface AppEligibilityInformation {
    * A user will be in at most one cohort.
    */
   cohort: Cohort | null;
+  /**
+   * Feature Sets
+   * If this property is undefined, it indicates that the host is an older version that doesn't support this property.
+   */
+  featureSet?: FeatureSet;
   /**
    * Indicates that the user is eligible for Microsoft Entra ID Authenticated Copilot experience.
    */
@@ -1150,6 +1155,22 @@ export interface AppEligibilityInformation {
   userClassification: UserClassification | null;
 }
 
+/**
+ * @hidden
+ * @beta
+ * Represents the feature set available to the user.
+ */
+export interface FeatureSet {
+  /**
+   * Server Feature set
+   */
+  serverFeatures: ReadonlyArray<string>;
+  /**
+   * UX Feature set
+   */
+  uxFeatures: ReadonlyArray<string>;
+}
+
 /**
  * @hidden
  *
diff --git a/packages/teams-js/test/private/copilot.spec.ts b/packages/teams-js/test/private/copilot.spec.ts
index 4de25d9e4b..6d89749d24 100644
--- a/packages/teams-js/test/private/copilot.spec.ts
+++ b/packages/teams-js/test/private/copilot.spec.ts
@@ -16,6 +16,7 @@ const mockedAppEligibilityInformation = {
     persona: Persona.Student,
     eduType: EduType.HigherEducation,
   },
+  featureSet: { serverFeatures: ['feature1', 'feature2'], uxFeatures: ['feature3'] },
 };
 
 const mockedAppEligibilityInformationUserClassificationNull = {
@@ -188,6 +189,24 @@ describe('copilot', () => {
           return expect(promise).resolves.toEqual(mockedAppEligibilityInformation);
         });
 
+        it(`should not throw if featureSet in response is undefined - with context ${frameContext}`, async () => {
+          await utils.initializeWithContext(frameContext);
+          utils.setRuntimeConfig(copilotRuntimeConfig);
+
+          const promise = copilot.eligibility.getEligibilityInfo();
+          const message = utils.findMessageByFunc('copilot.eligibility.getEligibilityInfo');
+          const mockedAppEligibilityInformationWithUndefinedFeatureSet = {
+            ...mockedAppEligibilityInformation,
+            featureSet: undefined,
+          };
+          expect(message).not.toBeNull();
+          if (message) {
+            utils.respondToMessage(message, mockedAppEligibilityInformationWithUndefinedFeatureSet);
+          }
+
+          return expect(promise).resolves.toEqual(mockedAppEligibilityInformationWithUndefinedFeatureSet);
+        });
+
         it(`should throw error if host returns error - with context ${frameContext}`, async () => {
           await utils.initializeWithContext(frameContext);
           utils.setRuntimeConfig(copilotRuntimeConfig);
@@ -319,6 +338,50 @@ describe('copilot', () => {
 
         await expect(promise).rejects.toThrowError('Error deserializing eligibility information');
       });
+
+      it('getEligibilityInfo should throw if AppEligibilityInformation.featureSet.serverFeatures is undefined', async () => {
+        await utils.initializeWithContext(FrameContexts.content);
+        utils.setRuntimeConfig(copilotRuntimeConfig);
+
+        const mockedInvalidAppEligibilityInformationWithInvalidUxFeatures = {
+          ...mockedAppEligibilityInformation,
+          featureSet: {
+            serverFeatures: undefined,
+            uxFeatures: [],
+          },
+        };
+
+        const promise = copilot.eligibility.getEligibilityInfo();
+        const message = utils.findMessageByFunc('copilot.eligibility.getEligibilityInfo');
+        expect(message).not.toBeNull();
+        if (message) {
+          utils.respondToMessage(message, mockedInvalidAppEligibilityInformationWithInvalidUxFeatures);
+        }
+
+        await expect(promise).rejects.toThrowError('Error deserializing eligibility information');
+      });
+
+      it('getEligibilityInfo should throw if AppEligibilityInformation.featureSet.uxFeatures is undefined', async () => {
+        await utils.initializeWithContext(FrameContexts.content);
+        utils.setRuntimeConfig(copilotRuntimeConfig);
+
+        const mockedInvalidAppEligibilityInformationWithInvalidUxFeatures = {
+          ...mockedAppEligibilityInformation,
+          featureSet: {
+            serverFeatures: [],
+            uxFeatures: undefined,
+          },
+        };
+
+        const promise = copilot.eligibility.getEligibilityInfo();
+        const message = utils.findMessageByFunc('copilot.eligibility.getEligibilityInfo');
+        expect(message).not.toBeNull();
+        if (message) {
+          utils.respondToMessage(message, mockedInvalidAppEligibilityInformationWithInvalidUxFeatures);
+        }
+
+        await expect(promise).rejects.toThrowError('Error deserializing eligibility information');
+      });
     });
   });
 });