OutlookとExchange Onlineで日本含め障害発生 http://okane.robots.jp/2022/01/17/outlook%e3%81%a8exchange-online%e3%81%a7%e6%97%a5%e6%9c%ac%e5%90%ab%e3%82%81%e9%9a%9c%e5%ae%b3%e7%99%ba%e7%94%9f/