- Failed to load resource: the server responded with a status of 403 (Forbidden)
uCollabWindow.jsp:1 XMLHttpRequest cannot load https://xxxx/vmrest/mailbox/folders/inbox/messages. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://yyyy' is therefore not allowed access. The response had HTTP status code 403.
UC appears to support CORS only as of 10.5. For previous versions, you will likely need to proxy the VMREST requests through your web service.