Set it as you home page.
Use the three dot ellipsis in the top right of Edge to select "Settings" and then near the top
Where it says "Open Microsoft Edge with" use the drop down to select "A specific page or pages" and then just type in
your Yahoo address and click the save icon
I'm not sure you you can get Yahoo mail as the default because it requires a PW but you can set the yahoo homepage as then select email from that page.
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.