A network engineer is deploying a Cisco Unified Border Element (CUBE) between an internal Cisco Unified Communications Manager cluster and a new SIP service provider. During testing, calls fail because the ITSP sends SIP messages with a Diversion header format that CUCM does not accept, and the provider requires a specific From-header domain that differs from CUCM's internal IP-based host. Which capability of CUBE should the engineer use to resolve these SIP interoperability issues without changing the CUCM or provider configuration?