Использование приложения Outlook для iOS в бизнес-средах для работы с электронной почтой и планирования мероприятий
Hi, my name is Jonathan and I'm here to help.
Several users are reporting the same issue. Outlook is currently experiencing issues, and you can check the status at this link:
https://portal.office.com/servicestatus/
You'll need to wait until Microsoft support fixes the issue.