Which action enables Cisco MRA?

Cisco MRA is designed for endpoint access to UCM and IM&P services, not primarily for VPN connectivity for Cisco UCC Express clients.

Cisco MRA's core purpose is to provide secure remote access to UCM services without requiring traditional VPN connectivity for endpoints.

Cisco MRA facilitates secure registration and call control for endpoints like Jabber clients that are located outside the corporate network, allowing them to communicate with Cisco UCM and IM and Presence Services through Expressway-C and Expressway-E. This enables remote users to access internal communication services as if they were on-premise, providing essential unified communications capabilities like calling and presence.

While MRA allows external clients to interact with internal services, its enablement is specifically about providing access to Cisco UCM for remote clients, not about internal SIP clients calling external companies.