Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello Gary K. Lea,
When you mention “Live 365,” are you trying to add your Yahoo account to the Outlook app on your Mac, or to Outlook in a web browser?
If you are using Outlook for Mac, please let us know what happens after you enter the Yahoo address. For example, does the Yahoo sign-in page fail to open, are your credentials rejected, or do you receive a specific error message?
Please share the exact error wording or a screenshot with any personal information hidden. That detail will help determine whether the issue is occurring in Outlook or during Yahoo’s sign-in and authorization process.
You can also compare the process with Microsoft’s official guide: Add an email account to Outlook for Mac. Thank you so much for your understanding.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.