What feature can block user access to non-company resources in Microsoft Office 365?

The feature that effectively blocks user access to non-company resources in Microsoft Office 365 is the Web Filter with Inline-CASB feature. This tool combines traditional web filtering with Cloud Access Security Broker (CASB) functionalities, enabling organizations to enforce security policies and control access to specific applications and websites.

By employing the Web Filter component, organizations can set rules that determine which resources are deemed appropriate for access, thus preventing users from reaching unauthorized or non-company resources while still utilizing Microsoft Office 365. The Inline-CASB functionality enhances this by providing visibility and control over cloud applications, allowing for the monitoring of user activities and the enforcement of data protection policies across cloud services.

VPNs, while useful for securing connections, primarily focus on establishing a secure link between the user and the corporate network, rather than explicitly controlling access to specific resources. Network segmentation and isolation may improve security posture but do not directly regulate user access within cloud applications. Device authentication protocols help ensure that only authenticated devices can connect to resources, but they don’t inherently restrict access based on the nature of the resources themselves.