Change your organization name
The name of your organization appears on the dashboard of the Google Admin console. Users see the organization name when choosing people to share Google Drive files or Sites with: they have the option to set sharing permissions for People at <your organization name>.
By default, your organization name is the domain name of your primary domain. The primary domain name might not be an appropriate name for your organization, especially if you associate multiple domains with your Google Apps account.
To change your organization name: