Allow calendar updates for external users
Customers are asking to allow other Office 365 tenants to modify their calendars. Currently, you can only share all details of your calendars, but UPDATES AND EDITS are not allowed. https://docs.microsoft.com/en-us/office365/admin/manage/share-calendars-with-external-users?view=o365-worldwide

2 comments
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Anonymous commented
i'd very much like to have an external contact (outside of organization) be able to edit a shared calendar.
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Anonymous commented
This would be very helpful.