To reset any administrator password:
- Visit your control panel login page. The control panel login page is https://www.google.com/a/your_domain.com. (Be sure to replace your_domain.com with your actual domain name.)
- Click 'I cannot access my account.'
- Click 'Reset your administrator password.'
The password reset process uses your account's secondary email address. If you don't have access to the secondary email address for your account, you can upload an HTML file or create a CNAME record to verify you own your domain and reset the admin password.
Need more help? More details on the reset admin password process