Update invite-internal-users.md

Minor JSON syntax update

Author: ljtill

articles/active-directory/b2b/invite-internal-users.md

@@ -74,27 +74,29 @@ POST https://graph.microsoft.com/v1.0/invitations
 Authorization: Bearer eyJ0eX...
 ContentType: application/json
 {
-    "invitedUserEmailAddress": "<<external email>>"",
-    "sendInvitationMessage": true,
-    "invitedUserMessageInfo": {
-        "messageLanguage": "en-US",
-        "ccRecipients": [
-            {
-                "emailAddress": {
-                    "name": null,
-                    "address": "<<optional additional notification email>>""
-                }
-            }
-        ],
-        "customizedMessageBody": "<<custom message>>"
-    },
-    "inviteRedirectUrl": "https://myapps.microsoft.com?tenantId=",
-    "invitedUser": {"id": "<<ID for the user you want to convert>>"}
+    "invitedUserEmailAddress": "<<external email>>",
+    "sendInvitationMessage": true,
+    "invitedUserMessageInfo": {
+        "messageLanguage": "en-US",
+        "ccRecipients": [
+            {
+                "emailAddress": {
+                    "name": null,
+                    "address": "<<optional additional notification email>>"
+                }
+            }
+        ],
+        "customizedMessageBody": "<<custom message>>"
+    },
+    "inviteRedirectUrl": "https://myapps.microsoft.com?tenantId=",
+    "invitedUser": {
+        "id": "<<ID for the user you want to convert>>"
+    }
 }
 ```
 
 The response to the API is the same response you get when you invite a new guest user to the directory.
 
 ## Next steps
 
-- [B2B collaboration invitation redemption](redemption-experience.md)
+- [B2B collaboration invitation redemption](redemption-experience.md)