what does error code: 0x8019019a mean

We should ignore Outlook if you’re using the Windows Mail app.

You wouldn’t lose any emails unless the account is set up to use pop as the incoming server.

There’s no problem keeping the original Yahoo or Gmail account & creating it again.

The only reason I mentioned Outlook, becuase you said I needed to arrange this app specific password and the only way I can do this is use the Outlook client, and the only option I have is the Outlook webmail app..

As I said in my previous message the problem is in my Windows Mail app. I've gone into all the settings until I'm blue in the face. I understand that each have their own settings and would not try otherwise.

If you remember I had the Outlook app with the Menu and Tools etc., but with all the activating, is just a Outlook webmail app.

Your suggestion of creating the account again would only mean me losing all my email that I wish to keep, so that is not an option. Surely this cannot be so difficult to rectify with Microsoft Community, and with this being the first time of using it, no very encouraging I'm afraid. Anthony

Can you clarify? You mention Outlook yet say the problem is with Windows Mail app - which is it?

You change the settings under the Mail app not Outlook.com. If you're using the Outlook email client (not Windows Mail) then you change the settings there.

I suspect that the accounts were set up automatically rather than manually creating them, this is why there's no option to change the password.

If so then you'll have to create the account again.

Yep, I have tried all that before, but I've just tried it again following below:

1. Go to "Tools" in your Outlook client
2. Click "Account Settings"
3. Choose your Yahoo account and click ‘Change’
4. Copy the app password above and paste it into the password field

Gernerate an app password

1. Sign in and go to your Account security page.

2.  Click Generate app password or Manage app passwords.

3. Select your app from the drop down menu and click Generate.
4. Follow the instructions below the password.
5. Click Done.
6. Use this app password and your email address to sign in to your email app

When I went into Yahoo just now, there was this message and I copied it:

We consider security a top priority. We sent an email that we're updating our authentication policies around third-party email access to better protect Yahoo Mail accounts. You may need to update your account settings in third-party programs to use a more secure approach. 

I had no email they mention obviously, But thought it might shed some light on it 

Also, when I am asked to fix theYahoo account I get this message: "Your Yahoo account settings are out of date. Learn more." When I do it says Check Your Password and Check Your Security Certificate, which I've done on both.

Of course it does not solve the Google account where I have no message at all, apart needs fixing with all the email reminders. Anthony

When you change the password are you using the created app specific password or just changing the account password?

Have you tried setting up the account again?