Hi @ym,
Thank you for posting your question in the Microsoft Q&A forum.
Based on the information you have provided, it looks like you need to export calendar in Outlook.
To export ICS link in Outlook Web:
- Go to Outlook Web > Settings > Calendar > Shared calendars.
- Select the calendar you want to export and select the permission.
- Click Publish and it will pop up HTML/ICS links for you to copy.
I hope this information helps.
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