Forum Discussion
Bizarre Yahoo Mail Connection Problem
I have Outlook 365 installed on two Windows 11 Pro PCs. Latest updates.
On one PC, I can use Outlook 365 as a mail client for my Yahoo mail account using the "old" interface, No issues.
On the other PC, Outlook 365 also used to work as a Yahoo Mail client but started having connection issues.
I've tried everything under the run to reconnect Outlook 365 to Yahoo Mail - no dice.
This includes completely uninstalling and trying to reinstall Outlook 365.
Here is where it gets bizarre.
If I switch to the "new interface" the Yahoo Mail account shows up and connects.
Switch back to the old interface, Yahoo Mail disappears.
I hate the new interface and need Outlook 365 to work on this second PC the same way it works on the first one.
Any ideas? Thanks!
4 Replies
Hornblower409 is correct, for Yahoo, the registry needs to have that key deleted. For Gmail, it's Windows credentials and then reconnect the 365 apps, maybe even remove it and re-add.
New Support Article on this issue with an additional workaround.
Users get errors 0x800CCC0E & 0x800CCC0F synchronizing Gmail and Yahoo accounts in classic Outlook
https://support.microsoft.com/en-us/topic/users-get-errors-0x800ccc0e-0x800ccc0f-synchronizing-gmail-and-yahoo-accounts-in-classic-outlook-e5a7b684-7c5c-4848-ab2d-d48291451f67
This usually happens because Microsoft Outlook in the old interface no longer authenticates properly with Yahoo Mail. The quickest fix is to remove the Yahoo account from Outlook, then add it again using IMAP with a Yahoo App Password (generated in Yahoo account security). Regular passwords often fail in the old Outlook profile. If it still disappears, create a new Outlook profile in Windows Mail settings and add the Yahoo account there.
The article title is "Unable to add a Gmail account ..." but I have seen reports that this bug can also cause any working IMAP account to fail. The fix is the same - Clear the Windows Credentials.
