To change your administrator password:

1. Go to admin.google.com.

2. Click Need help? below the Sign in button.

3. Select one of the following options:

      3.1 ) I don't know my password. Reset your password by entering the email address you use to sign in to Google. This can be your Gmail address, your Google Apps email address, or another email address associated with your account.

     3.2) I don't know my username. Receive instructions for accessing your account either at your recovery email address or phone number.

     3.3) I'm having other problems signing in. Enter the email address you use to sign in to Google. This can be your Gmail address, your Google Apps email address, or another email address associated with your account. Then follow the instructions that appear onscreen.