The most suitable functionality to automatically assign cases to an account's dedicated service agent, thereby...

Given that Ursa Major Solar (UMS) is satisfied with its current telephony provider, and this provider is compatible with Service Cloud Voice, the most appropriate recommendation is Service Cloud Voice with partner telephony. This option allows UMS to integrate its existing telephony solution into the Salesforce environment, leveraging its current systems while benefiting from the enhanced CRM capabilities of Service Cloud Voice. This integration ensures a seamless transition and utilization of familiar tools while accessing new functionalities like call transcription and CRM data integration during calls.