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If it didn’t work (in which case it immediately gets greyed out in the calendar menu), double-check steps 2 and 5 in particular.
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In the Access Permissions section on that page, activate the Make the calendar publicly available setting.Go to → My Calendars → the calendar you want to add → ⋮ → Settings and Sharing.Therefore, please refer to for information about the Service Provider's privacy practices.Do you want to have one less extension to have to deal with in Thunderbird, especially if you’re on the Beta release channel, or you can’t find a good download link for Provider for Google Calendar anymore? Here’s something that will save your day. In Thunderbird, find the Calendar area in the left-hand sidebar. Functionally, the Provider exchanges and transmits calendaring data between the User's computer and the Service. Collection and use of Information by the Service Provider: The collection and use of information by Service Provider is not governed by this privacy policy. This integration isn’t just for viewing information it allows you to take action. External calendars (say a Google Calendar) can be added via either iCalendar or CalDAV. The information is kept in your Thunderbird profile. The app has its own calendar, task management, contacts, and chat functionality. Storing of user data: The Provider stores your user data locally on your computer, using mechanisms provided by Thunderbird and its calendaring extension Lightning.
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Through a dashboard made available by the Service Provider, the Author has access to aggregated and summarized analytical information about the use of the Service, such as total number of requests by all users or rate of errors.
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Collection and use of information by the Author: The Author does not have access to user data exchanged between the User and the Service, including but not limited to calendar events, settings, or tasks. By using the Provider, you (the "User") agree to the policies set herein. This page contains the policies regarding collection, transmission and use of your data when using the Provider. The add-on synchronizes calendaring data with the Google Calendar API (the "Service"), owned by Google (the "Service Provider"). The Provider for Google Calendar (the "Provider") is an add-on for Thunderbird, written in part by Philipp Kewisch (the "Author").
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