See which address a machine connects through.
The hub address panel sits above the roll-out bar. Installs use the address in the heading. The table is the name each agent reported when it connected.
Open Updates and read the names
The heading is the address new installs use. Current on a row means that machine last connected through this hub. Accounts server is on it. Reception PC still reports old-hub.example.com. Both machines in this picture are offline, so there is no re-point button — that button counts only online machines whose name differs. When it is there, it tells each of those agents the new address. They drop off for a few seconds and come back through the new name.
Re-point is a two-step confirm, and only for machines that are online and still on another name. The agent writes its own configuration, answers, then reconnects. Keep the old hostname resolving until every row shows the current chip. An agent that predates set_server says so — roll it first, or re-run the install line with Apply. Push an agent update is the bar underneath.