การส่ง การรับ และการจัดระเบียบอีเมลใน Outlook.com
Hi, I'm Estrella. I'll do my best to help you.
There are currently several reports of the same issue with Outlook. From what I’ve checked, it appears to be a problem with the service. You can check the status here: https://portal.office.com/servicestatus/
You will need to wait until Microsoft fixes the issue.