Hi,
Thanks for reaching out and explaining what’s going on. Let’s sort this out together. First, could you confirm something for me, when you added your Yahoo account to Outlook, did you set it up as IMAP or POP? IMAP is needed for your subfolders to sync, while POP only brings in your Inbox.
In the meantime, here’s what I suggest:
Make sure your Yahoo account in Outlook is set up as IMAP. You can check this under File > Account Settings > Account Settings. If it’s POP, remove the account and add it back as IMAP.
If you use two-step verification in Yahoo, you’ll need to create an app password. Sign in to Yahoo, go to Account Security, and generate an app password for Outlook. Use that when you re-add the account.
Once that’s done, Outlook should automatically configure IMAP and start syncing your folders. If the folders don’t appear right away, try updating them by going to Send/Receive > Update Folder, or right-click your Yahoo account and select IMAP Folders > Query to make sure all folders are subscribed.
As for your calendar, Yahoo doesn’t sync directly with Outlook. You’ll need to export your Yahoo calendar as an .ics file and then import it into Outlook. In Yahoo, go to Calendar > Settings > Export, and in Outlook, go to File > Open & Export > Import/Export > Import an iCalendar (.ics).
I hope this clears things up. If you need more help, just let me know!
Regards,
Edward