ColleenD,
Ok, Then why did ALL 4 of my child accounts transfer when I only logged in and Yahoo updated the primary account? I was on Cox Chat for what seemed like forever, more than likely only 2-3 hours trying to get Thunderbird operational, when the Cox service technician informed me all of my child accounts were transferred. And that is why my child accounts were failing. I asked "Who transferred those accounts?" and I was informed they transferred when I transferred my primary account. So I guess I did it to myself. That was only my experience, your mileage may vary in this endeavour, as numerous questions from irate and frustrated Cox customers about this transfer of emails indicates.
My impression is that Cox ONLY cared about the transfer of email accounts as it pertained only to "web" usage of email services. Because Yahoo makes money from selling "upgraded" services and all the advertising it has on the web email services. When using 3rd party applications, it is very easy to filter out the advertising
And by and by. Yahoo was of no help getting Thunderbird operational with Yahoo services. I found user Waleee had accomplished what I had failed to do in 5 hours. 5 minutes after reading and following his post, Thunderbird was up and operational.