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On startup: "Authentication Required - Mozilla Thunderbird"." https://www.google.com is requesting your username and password". How do I find out which username and password it is looking for, I have tried all of my gmail accounts. Cause: Calendar

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On every login to Mozilla thunderbird it open a popup: "Authentication Required - Mozilla Thunderbird" "https://www.google.com is requesting your username and password" . I have tried all of my gmail account logins and passwords. How can I find out what it wants?

On every login to Mozilla thunderbird it open a popup: "Authentication Required - Mozilla Thunderbird" "https://www.google.com is requesting your username and password" . I have tried all of my gmail account logins and passwords. How can I find out what it wants?
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Modified by Wayne Mery

Chosen solution

Generally I find those dialogs are requesting the details for a calendar. For most of us that limits the issue quite a bit.

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Chosen Solution

Generally I find those dialogs are requesting the details for a calendar. For most of us that limits the issue quite a bit.