UseMyCurrentAccount

Get it in the Edge Extension Store

If you have multiple "Connected to Windows" accounts, you'll be prompted to pick which account every time you access a site that requires a login.

This extension will skip that screen by using your Edge profile account by default.

The recommended way to use this is to use a separate profile in Edge for each AAD account you have and install this extension in each profile. Then go to the site you want in the profile you want and you won't be prompted to login.

If you want to choose a different account, you can disable the functionality by clicking on the toolbar icon.