Have been experiencing this issue since July 5, 2014.
I have 3 Yahoo email accounts synced to my Live Mail. I am receiving just fine for 2 of those accounts, but one keeps asking for my password or saying that I'm using and incorrect password. I have reset my password in Yahoo 4 times already. I do not want to delete and add again because I have too much information that will be lost.
For the past week, when I need to send mail from that account I've been doing so through Yahoo -- which sucks big time and I don't want to send ads to people that I need to communicate with.
What is going on with this????