I am the client from China and would like to use Calendly. But I have an issue with sync to my outlook calendar. The issue seems to be caused by the outlook service in China is operated by 21Vianet instead of Microsoft.
You may see the explanation by Microsoft here : https://learn.microsoft.com/en-us/office365/servicedescriptions/office-365-platform-service-description/microsoft-365-operated-by-21vianet
Could you please advice if there is another way to sync my calendar with Calendly?