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setting up Thunderbird on mobile requires 'Windows Security , Mozilla Thunderbird. username & password. Can't find them

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martin234
martin234
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After a couple of years just receiving emails on my phone, I decided to sort out how to send them. I see that the Thunderbird App can be installed simply by pointing phone at desk top screen QR code. I clicked onto Thunderbird Settings/Export for Mobile then clicked 'export' and got request for Username and Password, but have not got these to hand and don't know where to find them. Tried various answers on Google to no avail. Photo of 'Windows Security, Mozilla Thunderbird' request box appears below (hopefully) Thank you

After a couple of years just receiving emails on my phone, I decided to sort out how to send them. I see that the Thunderbird App can be installed simply by pointing phone at desk top screen QR code. I clicked onto Thunderbird Settings/Export for Mobile then clicked 'export' and got request for Username and Password, but have not got these to hand and don't know where to find them. Tried various answers on Google to no avail. Photo of 'Windows Security, Mozilla Thunderbird' request box appears below (hopefully) Thank you
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