Sign in to the AWS Management Console using the root user credentials for the new account, utilizing the 64-character password provided in the initial AWS Organizations email sent to finance1@example.com. Proceed to configure the necessary IAM users.

From the management account, assume the OrganizationAccountAccessRole using the account ID of the new member account to switch roles. Then, set up the required IAM users.

Navigate to the AWS Management Console sign-in page, select “Sign in using root account credentials,” and log in using the email address finance1@example.com along with the root password of the management account. After logging in, create the IAM users as needed.

Access the AWS Management Console sign-in page and log in using the account ID of the new member account in conjunction with the Support1 IAM user credentials. Once logged in, establish the IAM users.