diff --git a/apps/teams-test-app/e2e-test-data/externalAppCardActionsForCEA.json b/apps/teams-test-app/e2e-test-data/externalAppCardActionsForCEA.json
new file mode 100644
index 0000000000..f6c1dfdf46
--- /dev/null
+++ b/apps/teams-test-app/e2e-test-data/externalAppCardActionsForCEA.json
@@ -0,0 +1,13 @@
+{
+  "name": "ExternalAppCardActionsForCEA",
+  "version": ">=2.29.0",
+  "platform": "Web",
+  "testCases": [
+    {
+      "title": "checkExternalAppCardActionsForCEACapability API Call - Success",
+      "type": "callResponse",
+      "boxSelector": "#box_checkExternalAppCardActionsForCEACapability",
+      "expectedTestAppValue": "External App Card Actions For CEA module is supported"
+    }
+  ]
+}
diff --git a/apps/teams-test-app/src/components/privateApis/ExternalAppCardActionsForCEAAPIs.tsx b/apps/teams-test-app/src/components/privateApis/ExternalAppCardActionsForCEAAPIs.tsx
index 282fc84f7f..f82468b6e1 100644
--- a/apps/teams-test-app/src/components/privateApis/ExternalAppCardActionsForCEAAPIs.tsx
+++ b/apps/teams-test-app/src/components/privateApis/ExternalAppCardActionsForCEAAPIs.tsx
@@ -14,9 +14,9 @@ const CheckExternalAppCardActionsForCEACapability = (): React.ReactElement =>
       } supported`,
   });
 
-const CECProcessActionSubmit = (): React.ReactElement =>
+const ProcessActionSubmitForCEA = (): React.ReactElement =>
   ApiWithTextInput<{
-    appId: AppId;
+    appId: string;
     conversationId: string;
     actionSubmitPayload: IAdaptiveCardActionSubmit;
   }>({
@@ -27,13 +27,16 @@ const CECProcessActionSubmit = (): React.ReactElement =>
         if (!input.appId) {
           throw new Error('appId is required');
         }
+        if (!input.conversationId) {
+          throw new Error('conversationId is required');
+        }
         if (!input.actionSubmitPayload) {
           throw new Error('actionSubmitPayload is required');
         }
       },
       submit: async (input) => {
         await externalAppCardActionsForCEA.processActionSubmit(
-          input.appId,
+          new AppId(input.appId),
           input.conversationId,
           input.actionSubmitPayload,
         );
@@ -42,6 +45,7 @@ const CECProcessActionSubmit = (): React.ReactElement =>
     },
     defaultInput: JSON.stringify({
       appId: 'b7f8c0a0-6c1d-4a9a-9c0a-2c3f1c0a3b0a',
+      conversationId: 'conversationId',
       actionSubmitPayload: {
         id: 'submitId',
         data: 'data1',
@@ -49,9 +53,9 @@ const CECProcessActionSubmit = (): React.ReactElement =>
     }),
   });
 
-const CECProcessActionOpenUrl = (): React.ReactElement =>
+const ProcessActionOpenUrlForCEA = (): React.ReactElement =>
   ApiWithTextInput<{
-    appId: AppId;
+    appId: string;
     conversationId: string;
     url: string;
   }>({
@@ -62,13 +66,16 @@ const CECProcessActionOpenUrl = (): React.ReactElement =>
         if (!input.appId) {
           throw new Error('appId is required');
         }
+        if (!input.conversationId) {
+          throw new Error('conversationId is required');
+        }
         if (!input.url) {
           throw new Error('url is required');
         }
       },
       submit: async (input) => {
         const result = await externalAppCardActionsForCEA.processActionOpenUrl(
-          input.appId,
+          new AppId(input.appId),
           input.conversationId,
           new URL(input.url),
         );
@@ -77,6 +84,7 @@ const CECProcessActionOpenUrl = (): React.ReactElement =>
     },
     defaultInput: JSON.stringify({
       appId: 'b7f8c0a0-6c1d-4a9a-9c0a-2c3f1c0a3b0a',
+      conversationId: 'conversationID',
       url: 'https://www.example.com',
     }),
   });
@@ -84,8 +92,8 @@ const CECProcessActionOpenUrl = (): React.ReactElement =>
 const ExternalAppCardActionsForCEAAPIs = (): React.ReactElement => (
   <ModuleWrapper title="External App Card Actions For CEA">
     <CheckExternalAppCardActionsForCEACapability />
-    <CECProcessActionSubmit />
-    <CECProcessActionOpenUrl />
+    <ProcessActionSubmitForCEA />
+    <ProcessActionOpenUrlForCEA />
   </ModuleWrapper>
 );
 
diff --git a/change/@microsoft-teams-js-04213847-0138-4547-976c-ae02297702f0.json b/change/@microsoft-teams-js-04213847-0138-4547-976c-ae02297702f0.json
new file mode 100644
index 0000000000..ad77d943d6
--- /dev/null
+++ b/change/@microsoft-teams-js-04213847-0138-4547-976c-ae02297702f0.json
@@ -0,0 +1,7 @@
+{
+  "type": "patch",
+  "comment": "Updated types for `externalAppCardActionsForCEA` capability.",
+  "packageName": "@microsoft/teams-js",
+  "email": "maggiegong@microsoft.com",
+  "dependentChangeType": "patch"
+}
diff --git a/packages/teams-js/src/private/externalAppCardActionsForCEA.ts b/packages/teams-js/src/private/externalAppCardActionsForCEA.ts
index eea0d73ce8..57c1644069 100644
--- a/packages/teams-js/src/private/externalAppCardActionsForCEA.ts
+++ b/packages/teams-js/src/private/externalAppCardActionsForCEA.ts
@@ -47,7 +47,7 @@ export namespace externalAppCardActionsForCEA {
         ApiName.ExternalAppCardActionsForCEA_ProcessActionOpenUrl,
       ),
       ApiName.ExternalAppCardActionsForCEA_ProcessActionOpenUrl,
-      [appId, url.href, conversationId],
+      [appId.toString(), conversationId, url.href],
     );
     if (error) {
       throw error;
@@ -84,7 +84,9 @@ export namespace externalAppCardActionsForCEA {
         ApiName.ExternalAppCardActionsForCEA_ProcessActionSubmit,
       ),
       ApiName.ExternalAppCardActionsForCEA_ProcessActionSubmit,
-      [appId, conversationId, actionSubmitPayload],
+      appId.toString(),
+      conversationId,
+      actionSubmitPayload,
     );
     if (error) {
       throw error;
diff --git a/packages/teams-js/test/private/externalAppCardActionsForCEA.spec.ts b/packages/teams-js/test/private/externalAppCardActionsForCEA.spec.ts
index 2bd9e42196..db8520e0d9 100644
--- a/packages/teams-js/test/private/externalAppCardActionsForCEA.spec.ts
+++ b/packages/teams-js/test/private/externalAppCardActionsForCEA.spec.ts
@@ -75,7 +75,7 @@ describe('externalAppCardActionsForCEA', () => {
           const message = utils.findMessageByFunc(ApiName.ExternalAppCardActionsForCEA_ProcessActionSubmit);
           if (message && message.args) {
             expect(message).not.toBeNull();
-            expect(message.args[0]).toEqual([testAppId, testConversationId, testActionSubmitPayload]);
+            expect(message.args).toEqual([testAppId.toString(), testConversationId, testActionSubmitPayload]);
             utils.respondToMessage(message, undefined);
           }
 
@@ -94,7 +94,7 @@ describe('externalAppCardActionsForCEA', () => {
           const message = utils.findMessageByFunc(ApiName.ExternalAppCardActionsForCEA_ProcessActionSubmit);
           if (message && message.args) {
             expect(message).not.toBeNull();
-            expect(message.args[0]).toEqual([testAppId, testConversationId, testActionSubmitPayload]);
+            expect(message.args).toEqual([testAppId.toString(), testConversationId, testActionSubmitPayload]);
             utils.respondToMessage(message, testError);
           }
           await expect(promise).rejects.toEqual(testError);
@@ -161,7 +161,7 @@ describe('externalAppCardActionsForCEA', () => {
           const message = utils.findMessageByFunc(ApiName.ExternalAppCardActionsForCEA_ProcessActionOpenUrl);
           if (message && message.args) {
             expect(message).not.toBeNull();
-            expect(message.args).toEqual([testAppId, testUrl.href, testConversationId]);
+            expect(message.args).toEqual([testAppId.toString(), testConversationId, testUrl.href]);
             utils.respondToMessage(message, null, testResponse);
           }
 
@@ -178,7 +178,7 @@ describe('externalAppCardActionsForCEA', () => {
           const message = utils.findMessageByFunc(ApiName.ExternalAppCardActionsForCEA_ProcessActionOpenUrl);
           if (message && message.args) {
             expect(message).not.toBeNull();
-            expect(message.args).toEqual([testAppId, testUrl.href, testConversationId]);
+            expect(message.args).toEqual([testAppId.toString(), testConversationId, testUrl.href]);
             utils.respondToMessage(message, testError, null);
           }