Which Cisco Collaboration Edge architecture product allows remote endpoints to leverage corporate on-premises Cisco Unified Communications infrastructure?

Cisco Webex is a cloud-based collaboration suite and, while it can integrate with on-premises infrastructure, it is not the primary component for remote endpoints directly leveraging on-premises UC infrastructure in the way MRA is designed for.

A Cisco VPN Client provides general network access to the corporate internal network, but MRA provides a dedicated and optimized solution for UC services without full VPN overhead, which is specifically designed for remote UC access.

Cisco Unified Communications Mobile and Remote Access (MRA) allows users with Cisco Jabber, IP phones, or other compatible endpoints outside the corporate firewall to register and make calls using their on-premises Cisco Unified Communications Manager (CUCM) infrastructure without requiring a VPN client. MRA leverages Cisco Expressway-C and Expressway-E for secure traversal of the corporate network boundary.

Cisco Umbrella is a cloud security platform that provides DNS-layer security and secure web gateway services, not a component for remote access to on-premises UC infrastructure.