Which feature allows a user to log into any phone and use their own extension?

Hot Desking (Option B) allows a user to log into any IP Office phone with their extension and profile using a login code, ideal for shared workspaces. Option A (Mobile Twinning) links to external numbers, Option C (Call Forwarding) redirects calls, and Option D (Remote Worker) is a user profile, not a login feature.References: Avaya IP Office Hot Desking Configuration Guide.