diff --git a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/CommonDefinitions.json b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/CommonDefinitions.json
index a372162ced14..c396923f83d0 100644
--- a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/CommonDefinitions.json
+++ b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/CommonDefinitions.json
@@ -751,6 +751,14 @@
               "type": "string",
               "readOnly": true
             },
+            "subjectAlternativeNames": {
+              "description": "Subject alternative names the certificate applies to.",
+              "type": "array",
+              "items": {
+                "type": "string"
+              },
+              "readOnly": true
+            },
             "value": {
               "format": "byte",
               "description": "PFX or PEM blob",
diff --git a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Certificate_CreateOrUpdate.json b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Certificate_CreateOrUpdate.json
index d3e1b7811c9f..3c79cd35b201 100644
--- a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Certificate_CreateOrUpdate.json
+++ b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Certificate_CreateOrUpdate.json
@@ -23,6 +23,9 @@
         "properties": {
           "provisioningState": "Succeeded",
           "subjectName": "my-subject-name.company.country.net",
+          "subjectAlternativeNames": [
+            "CN=my-subject-name.com"
+          ],
           "issuer": "Issuer Name",
           "issueDate": "2021-11-06T04:00:00Z",
           "expirationDate": "2022-11-06T04:00:00Z",
diff --git a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Certificate_Get.json b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Certificate_Get.json
index aa06c48d0f3d..d6ef5ff698c2 100644
--- a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Certificate_Get.json
+++ b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Certificate_Get.json
@@ -17,6 +17,9 @@
         "properties": {
           "provisioningState": "Succeeded",
           "subjectName": "my-subject-name.company.country.net",
+          "subjectAlternativeNames": [
+            "CN=my-subject-name.com"
+          ],
           "issuer": "Issuer Name",
           "issueDate": "2021-11-06T04:00:00Z",
           "expirationDate": "2022-11-06T04:00:00Z",
diff --git a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Certificates_ListByManagedEnvironment.json b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Certificates_ListByManagedEnvironment.json
index 991a02a00739..aa2a35cb5712 100644
--- a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Certificates_ListByManagedEnvironment.json
+++ b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Certificates_ListByManagedEnvironment.json
@@ -18,6 +18,9 @@
             "properties": {
               "provisioningState": "Succeeded",
               "subjectName": "my-subject-name.company.country.net",
+              "subjectAlternativeNames": [
+                "CN=my-subject-name.com"
+              ],
               "issuer": "Issuer Name",
               "issueDate": "2021-11-06T04:00:00Z",
               "expirationDate": "2022-11-06T04:00:00Z",
@@ -33,6 +36,9 @@
             "properties": {
               "provisioningState": "Succeeded",
               "subjectName": "my-subject-name.company.country.net",
+              "subjectAlternativeNames": [
+                "CN=my-subject-name.com"
+              ],
               "issuer": "Issuer Name",
               "issueDate": "2021-11-06T04:00:00Z",
               "expirationDate": "2022-11-06T04:00:00Z",
diff --git a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Certificates_Patch.json b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Certificates_Patch.json
index e4622ef4bc46..7d9eb043bebc 100644
--- a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Certificates_Patch.json
+++ b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/Certificates_Patch.json
@@ -26,6 +26,9 @@
         "properties": {
           "provisioningState": "Succeeded",
           "subjectName": "my-subject-name.company.country.net",
+          "subjectAlternativeNames": [
+            "CN=my-subject-name.com"
+          ],
           "issuer": "Issuer Name",
           "issueDate": "2021-11-06T04:00:00Z",
           "expirationDate": "2022-11-06T04:00:00Z",
diff --git a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/ConnectedEnvironmentsCertificate_CreateOrUpdate.json b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/ConnectedEnvironmentsCertificate_CreateOrUpdate.json
index 33685e87de7d..3ada6fb2a435 100644
--- a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/ConnectedEnvironmentsCertificate_CreateOrUpdate.json
+++ b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/ConnectedEnvironmentsCertificate_CreateOrUpdate.json
@@ -23,6 +23,9 @@
         "properties": {
           "provisioningState": "Succeeded",
           "subjectName": "my-subject-name.company.country.net",
+          "subjectAlternativeNames": [
+            "CN=my-subject-name.com"
+          ],
           "issuer": "Issuer Name",
           "issueDate": "2021-11-06T04:00:00Z",
           "expirationDate": "2022-11-06T04:00:00Z",
diff --git a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/ConnectedEnvironmentsCertificate_Get.json b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/ConnectedEnvironmentsCertificate_Get.json
index 2eb51ca9bb06..a28e599c4e31 100644
--- a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/ConnectedEnvironmentsCertificate_Get.json
+++ b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/ConnectedEnvironmentsCertificate_Get.json
@@ -17,6 +17,9 @@
         "properties": {
           "provisioningState": "Succeeded",
           "subjectName": "my-subject-name.company.country.net",
+          "subjectAlternativeNames": [
+            "CN=my-subject-name.com"
+          ],
           "issuer": "Issuer Name",
           "issueDate": "2021-11-06T04:00:00Z",
           "expirationDate": "2022-11-06T04:00:00Z",
diff --git a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/ConnectedEnvironmentsCertificates_ListByConnectedEnvironment.json b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/ConnectedEnvironmentsCertificates_ListByConnectedEnvironment.json
index fdba5f9659c9..a96cfa5f2752 100644
--- a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/ConnectedEnvironmentsCertificates_ListByConnectedEnvironment.json
+++ b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/ConnectedEnvironmentsCertificates_ListByConnectedEnvironment.json
@@ -18,6 +18,9 @@
             "properties": {
               "provisioningState": "Succeeded",
               "subjectName": "my-subject-name.company.country.net",
+              "subjectAlternativeNames": [
+                "CN=my-subject-name.com"
+              ],
               "issuer": "Issuer Name",
               "issueDate": "2021-11-06T04:00:00Z",
               "expirationDate": "2022-11-06T04:00:00Z",
@@ -33,6 +36,9 @@
             "properties": {
               "provisioningState": "Succeeded",
               "subjectName": "my-subject-name.company.country.net",
+              "subjectAlternativeNames": [
+                "CN=my-subject-name.com"
+              ],
               "issuer": "Issuer Name",
               "issueDate": "2021-11-06T04:00:00Z",
               "expirationDate": "2022-11-06T04:00:00Z",
diff --git a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/ConnectedEnvironmentsCertificates_Patch.json b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/ConnectedEnvironmentsCertificates_Patch.json
index 249c8bc1d4eb..92506a36c579 100644
--- a/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/ConnectedEnvironmentsCertificates_Patch.json
+++ b/specification/app/resource-manager/Microsoft.App/preview/2022-06-01-preview/examples/ConnectedEnvironmentsCertificates_Patch.json
@@ -26,6 +26,9 @@
         "properties": {
           "provisioningState": "Succeeded",
           "subjectName": "my-subject-name.company.country.net",
+          "subjectAlternativeNames": [
+            "CN=my-subject-name.com"
+          ],
           "issuer": "Issuer Name",
           "issueDate": "2021-11-06T04:00:00Z",
           "expirationDate": "2022-11-06T04:00:00Z",