A knowledge base article about Reassign Voice Service to a New Subscriber - Change Name on Service provided by the UC Berkeley IT Service Hub - Knowledge Portal
This quick video ( https://youtu.be/Jp5VNJo0zdc ) shows how to rename a voice service to an individual, department, or another descriptive name as well as update the voicemail or cellular security as services are reassigned.
Use the Change Name on Service form to update the ownership of service - the Billing Name, the name displayed on the PBX Phone Set, and the Voicemail System.