Create an account in BING Webmaster tool and log in to the webmaster.
On the Home page Click on Add Site
Enter your word press website address as shown below and click the submit button
In the verify Ownership page, Copy the meta tag similar as shown below
Now login to Word-press (wp-admin) and go to the dashboard
Click on tools, there you will find the Webmaster Tool Verification
Paste the copied Metatag in the Bing Webmaster Center and save the changes.
(* If webmaster tool plugin is not available, install it)
Now go to Bing web master tool and click on verify.