I find personally with even the latest V9.2.2307 and V10.1.4828 on eg: Mac Sequoia, the default Yahoo automatic account wizard OAuth token setup adds in your account where you “press Agree at the end” and “tick the box to always open eM Client” in your browser which then brings eM Client into the foreground and receives mail.
However “even though the Contacts and Calendar are showing added in ok in Accounts” with the same token username, the Contacts and Calendar “are not showing in eM Client”. (Only my other Non Yahoo IMAP accounts & Local Contacts and Local Calendar). Even testing with multiple browsers.
If you also select the “Default Folders” for the Contacts and Calendar in accounts there is no Yahoo accounts added in those sections “even though they have successfully been accepted into the Yahoo account security” via the OAuth token.
The only way i can get Yahoo Contacts “to show and work ok in eM Client” is to use a generated Yahoo App password.
However if i use the same generated app password for the Yahoo Calendar in accounts, eM Client always says its invalid password no matter how many times i enter it.
The Yahoo Calendar URL appears to be correct as per @Gary post further up the thread.
According to the Yahoo technical support they say their end is ok and it must be an eM Client issue. I even created brand new databases to test and same issue.
So the Calendar won’t work via either the default OAuth token setup or Generated App pass. So I think “eM Client devs need to investigate this”.
eM Client V9 / V10 Yahoo automatic account wizard setup using Chrome & Edge Browsers
