You can sign in with your Adobe ID or using your MBI email address and password.
Click Sign in with Adobe ID.
Enter the email address you used when you created your MBI account. If you do not already have an Adobe account, click Create an account and enter your information. Remember to use the email address you used when you created your MBI account. The email address is the key you need to access your Adobe account.
If you log in using your Adobe ID, you will not be able to change your MBI profile password.
Enter your email address and password and click Sign In.
You now have access to MBI.