The Office Customization Tool creates the configuration files that are used to deploy Office in large organizations. These configuration files give you more control over an Office installation: you can define which applications and languages are installed, how those applications should be updated, and application preferences. After creating the configuration files, you can use them with the Office Deployment Tool to deploy a customized version of Office.
To work with the service, go to Office Customization Tool and choose the products, languages, and application preferences you want to configure. For example, you can create a configuration file that downloads the 64-bit English version of Microsoft 365 Apps, or you can create a file that installs the 64-bit English and German version of Office without Access and Publisher and with the EULA automatically accepted. When you're done, you export the configuration file, which you can then use with the Office Deployment Tool or another software distribution solution to deploy Office in your organization.