I am having exactly the same problem; am a user with an
x@verizon.net email account thru AOL mail. Switched last wk to new laptop with Windows 10, Outlook 20019 (64 bit) in order to retire my old Windows 7 laptop whose battery is no longer any good.
I also have an Android phone with AOL app on it from which I can access emails as well as the AOL web site to access my emails. On-line and phone work fine, haven't changed anything. The new PC is another matter. I should add my old laptop was set to POP3 settings.
I have spent days, 4 separate multiple hour Tech sessions with AOL technical support. My Outlook Email incoming & outgoing server settings keep reverting to imap.mail.yahoo.com & smtp.mail.yahoo.com. They keep typing in imap.aol.com and smtp.verizon.com and using app password. In the 3rd session they deleted the email acct in my Outlook and re-added it. That worked for roughly 6 hrs and then Outlook stopped receiving new emails and won't connect. The Outlook account settings reverted to mail.yahoo.com.
If I go into Server settings they are set to imap.aol.com and smtp.AOL.com (not verizon.net).
If I go into Manage Profiles tthey are set to imap.aol.com and smtp.AOL.com.
If I go into Control Panel, Mail (Outlook) they are set to imap.aol.com and smtp.AOL.com.
But none of these are stating mail.yahoo.com. I am not sure about the conflict in the outgoing server setting of verizon.net vs AOl.com, altought the tech person never picked up on this?
The 4th Tech support person today tried over-righting the yahoo.com server settings with map.aol.com and smtp.verizon.com and AP Password several times to no avail. I kept telling her that is what previous techs did and to keep doing the same thing wasn't accomplishing anything. I kept asking here where is the yahoo.com default coming from? Is there even a Yahoo mail server any longer? Is this something coming from the AOL IMAP server? Or some bug from the Verizon email migration from Yahoo mail to AOL mail (although that was several yrs ago). She couldn't answer and said Outlook is 3rd party application and to call MS Outlook for help, she couldn't do anymore. Said she has not come across this problem before. (Port #'s are correct).
My system attempts to Send/ Receive and the progress details sits there for hours to synchronize with my subscribed folders for
z@verizon.net, but no new emails come in. Test messages are going out and can see them on my Phone app and online.
So here I am although I realize this is not MS officially