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Getting Office 16 to open Thunderbird instead of Outlook

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  • Last reply by Toad-Hall

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Thunderbird is my default mail app. I have tried everything I read on the Internet to get Excel 16 and Word 16 to open Thunderbird instead of Outlook when I email from their programs. Nothing has worked. Please help.

Thunderbird is my default mail app. I have tried everything I read on the Internet to get Excel 16 and Word 16 to open Thunderbird instead of Outlook when I email from their programs. Nothing has worked. Please help.

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I am not aware of a way to change the hard coded use of outlook in those office apps.

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I see in the registry under Local_Machine\Software\clients\Mail\Microsoft Outlook: MSIApplication... Reg_Milti_SZ "Microsoft\Office\16.0\Outlook LastUILanguage" and other mentions of Office in there. Could that be the issue?

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