This looks promising... https://www.ubackup.com/articles/yahoo-mail-not-working-with-outlook365.html#:~:text=Why%20is%20Yahoo%20mail%20not,an%20app%20password%20for%20Outlook.
Haven't had a chance to try it yet... won't have time for that for a few hours.
Okay, I figured it all out. But first a suggestion when giving directions, be specific with names and titles, do not use "it" or "that" or assume anything. All "Click" references are left-clicks with the mouse.
First, go to Yahoo mail, to your former Cox.net account. Put your cursor on your name and/or picture in the right top corner. Click "Manage Your Account." Click on the Security Tab. In the box labeled, "Other ways to sign in", click "Generate and manage app passwords". Type in "Outlook" in the "App name" line. Click "Generate password". Copy that password. Don't worry about the spaces in the password, they do not convey when pasting.
Next go to Outlook. Click the File tab, click Account Settings box, click "Account Settings". Click "New". Type in your old Cox email address, click "Advanced options". Check-mark "Let me set up my account manually". Click "Connect". Click "POP" or whatever method you want to use. (I personally use POP so I will explain that version but what I explain should carry over to the other set ups.) Now the password screen appears. Paste the app password in the box. Click "Connect". Wait for the setup to "fail" when you are presented with the credentials box to log in. Click "Cancel". Click "Change Account Settings". Now change the Incoming Server to "pop.mail.yahoo.com" and the Outgoing Server to "smtp.mail.yahoo.com". Click "Next". You are presented with the password screen (again) that is prefilled, click "Connect". You should get a successful message.
Thank you! Finally got it to work.
I forgot one thing. When Outlook creates a new account, the location of the outlook.pst data file this creates may be in your "Documents/Outlook Files" folder. But my current Outlook.pst file is in the "<username>/AppData/Local/Microsoft/Outlook" folder. So I had to change the Outlook data file location where the "New" Cox email account looks to find it.
Great work. I struggled with how to get that done within the original email account in Outlook. I know someone that called Yahoo tech support and they remoted in and made changes in the original email account so it would work, after waiting on hold for over 90 minutes.
I forgot one thing. When Outlook creates a new account, the location of the outlook.pst data file this creates may be in your "Documents/Outlook Files" folder. But my current Outlook.pst file is in the "<username>/AppData/Local/Microsoft/Outlook" folder. So I had to change the Outlook data file location where the "New" Cox email account looks to find it. I can help with that if needed. Otherwise, you end up with 2 inboxes.
I forgot one thing. When Outlook creates a new account, the location of the outlook.pst data file this creates may be in your "Documents/Outlook Files" folder. But my current Outlook.pst file is in the "<username>/AppData/Local/Microsoft/Outlook" folder. So I had to change the Outlook data file location where the "New" Cox email account looks to find it. I can help with that if needed. Otherwise, you end up with 2 inboxes. So what you do is when you are in the window/box where you change the Incoming and Outgoing servers to Yahoo, at the bottom of the box is where you select "Use an existing data file," then browse to find your existing Outlook.pst data file.
I have Outlook working now, but I found something very curious. Go to "Account Settings", then "account settings" again. Now highlight your email address and click the "repair" tab. Click "Advanced Options" and "Let me repair my account". Then click "repair". It shows the old Cox server IMAP addresses and a different password. Why?
It's repairing it to the former settings that it stored in case there was a corruption? I don't see where repair is appropriate for our problem anyway. There was no file damage. Even though our Yahoo account uses the password we created, Outlook requires an app password created by Yahoo for security purposes. This app password is only good for one device and one app to prevent the proliferation of stolen accounts.
