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How do I sync my Outlook calendar into Thunderbird calendar?

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I have an outlook.com calendar and I simply want to view it in Thunderbird calendar? How do I sync it?

I have an outlook.com calendar and I simply want to view it in Thunderbird calendar? How do I sync it?

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Thunderbird uses the IMAP protocol to work with mail on Outlook.com. In order to sync with an Outlook.com calendar Microsoft requires using Exchange ActiveSync, which is not built into Thunderbird.

There is a non-free add-on which adds Exchange ActiveSync capability to Thunderbird that you can check out if no one else has an easier/cheaper suggestion:

https://addons.mozilla.org/thunderbird/addon/exquilla-exchange-web-services/