Configuring an attachment compliance rule in Gmail allows you to specifically block certain types of files from being sent or received as email attachments. This approach is simple and cost-effective because it leverages Google Workspace's built-in functionality without requiring third-party solutions or advanced configurations. You can easily specify which file types to block, ensuring that your organization is protected from undesirable attachments.

To enable single sign-on (SSO) through Google Workspace, you need to create a new SAML application in the Google Admin console. This allows users to authenticate centrally through Google Workspace when accessing the marketing platform, leveraging SAML 2.0 compatibility. You can then upload the metadata provided by the marketing platform vendor to complete the integration. This approach ensures streamlined access and centralized authentication for your employees.

To manage users and settings in Google Workspace, you must verify domain ownership. If the domain is not verified, you won't be able to create new user accounts or modify user settings. Checking the DNS settings and completing the domain verification process will resolve the issue and allow you to manage users and services in Google Workspace.

Using Chrome browser policies, you can force-install specific extensions on all managed Chrome Enterprise browsers. This ensures that the desired extensions are automatically installed on users' browsers without requiring manual installation. This approach is the most efficient and scalable solution for managing extensions across a large organization.

The audit log in the Google Admin console provides detailed information about device and application activity, which is crucial for investigating a potential data breach. You can see which devices have accessed corporate data, as well as which applications were used, giving you a comprehensive view of any unauthorized or suspicious activities. This is the most appropriate and efficient tool for this investigation.