i cannot set my email default account

[ter]

i have set up my yahoo account in outlook but when i try to set it as the
default i am unable too

 

[Roady [MVP]]

What happens when you try?

 

[ter]

Thanks for your reply. I decided to give it one last try and it worked
however now I can't work out how to get my old emails (sent and received)
transferred accross