12.x you can reset the password with forgot your password.
https://www-secure.symantec.com/connect/articles/how-reset-symantec-endpoint-protection-manager-console-password-sep-121
https://www-secure.symantec.com/connect/forums/reset-admin-account
To reset a forgotten password
1. On the management server computer, click Start > All Programs > Symantec Endpoint Protection Manager >Symantec Endpoint Protection Manager.
2. In the Logon screen, click Forgot your password?
3. In the Forgot Password dialog box, type the user name for the account for which to reset the password.
4. Click Temporary Password.