Adding site to Bing
4. Once you’ve copied that meta tag, go back to your WordPress site and paste it into the Bing Webmaster Verification field on the General Settings screen of All in One SEO Pack, then scroll to the top or bottom of the page and click Update Options.
5. Now, go back to the Bing Webmaster Tools page that you got the code from and click Verify.
You should now be taken to a dashboard where you can access all the Bing Webmaster Tools.