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Calendar Sync problems

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I'm on Thunderbird 78.4.1 release. I can add an event in Thunderbird calendar, but it does not get added to Google calendar. I can add an event in Google calendar and it does get added to Thunderbird calendar. I can delete an event in Thunderbird calendar, that is also in Google calendar, and it does get deleted in Google calendar. I have 3 extensions: Provider for CalDav & CardDav, Provider for Google Calendar, & TbSync. I've tried enabling & disabling all combinations, but still cannot get Thunderbird calendar event to get added to Google calendar. Is there a post specifically for my release of Thunderbird that explains how to properly sync these calendars?

I'm on Thunderbird 78.4.1 release. I can add an event in Thunderbird calendar, but it does not get added to Google calendar. I can add an event in Google calendar and it does get added to Thunderbird calendar. I can delete an event in Thunderbird calendar, that is also in Google calendar, and it does get deleted in Google calendar. I have 3 extensions: Provider for CalDav & CardDav, Provider for Google Calendar, & TbSync. I've tried enabling & disabling all combinations, but still cannot get Thunderbird calendar event to get added to Google calendar. Is there a post specifically for my release of Thunderbird that explains how to properly sync these calendars?

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I got it resolved. 1. Only Add-on needed is Provider for Google Calendar 2. I exported my calendars, & deleted/unsubscribed from calendars in T'bird. 3. Went through the process of add a new calendar (network) pointing to my Google account.

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Can I sync my Thunderbird 78.6 calendar with my iPhone 8 calendar?

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Big Sam's 3 step fix on 11/13/20 worked perfectly for me.