Adding A User To An Existing Bing Account
You can add an Admin to your account in Bing by clicking on the green gear next to your email address in the upper right-hand corner of the screen after you’re logged in.
Notice on the left-hand side of the main menu the second option is Users.
Click the green button “Invite user”
You’ll be asked to enter First and Last Name as well as Email address. Choose a role.
It’s likely best to start off with the most restrictive and if you need to give more access you can later. I suggest Advertiser Campaign Managerthis role has less permissions than Standard and Super Admin