I have an Yahoo Mail account which I set up min OUTLOOK 2011 on a Mac OS X 10.9.5

This email account is also setup on Outlook 2010 on my Windows Laptop.  The problem that I have now is as that In keep getting a pop-up on MAC and Windows Outlook asking me for my user name and password; even after I selected the option to remember the password. As a result, my outlook on MAC and Windows does not sync my emails nor does it send emails.  I did send and recieve when I first set up this account on Outlook. I can however view and send emails on Yahoo itself, but not on Outlook for MAC or WIndows.

I've been informed that this has something to do with POP/IMAP/SMTP forwarding on Yahoo itself; I went into my Yahoo account to check and set these settings, but still no luck.

Any advise on this will be appreciated as this is a matter of urgency.

Thank you in advance for your assistance....

Michael D Venter (PhD)