I’ll introduce the fact that a password reset is required for the first root account login after creating a new account in AWS Organizations.

Background: Want to Login to Child Organization After Creating New Account in AWS Organizations

After creating a new account in AWS Organizations, I wanted to login to the child organization but didn’t know how, so I looked it up.

Solution: First Login with Root Account After Password Reset

As described in the official AWS help, I was able to set a password from the email received after password reset and perform the first login.

Option 2: Use root user credentials

When you create a new member account, Organizations sets an initial password for that account. This password cannot be retrieved. To access the account for the first time as the root user, follow these steps to reset the initial password.

Source: AWS Organizations で作成されたメンバーアカウントにアクセスする (Accessing member accounts created in AWS Organizations)

That’s all from the Gemba.