Scheduling and managing events using Outlook.com calendar
Hi,
Exporting of Calendar from Outlook.com is not yet available. You can only share it with other people in which they are able to add it directly to their calendar view in Outlook. Depending on the permission you give them, they can view your calendar or edit it.
We suggest that you check this link for more information and updated workaround to share your calendar.
Since exporting of the calendar is not yet available, we recommend that you send us a feedback to help our support engineers to take note of the option in the future updates.
Your reply is most important for us to ensure we assist you accordingly.