When checking for updates in the vCenter Server Appliance Management Interface (VAMI) on port 5480, no available updates are displayed, even if a newer version is known to exist.
The vCenter Server Appliance is configured with an outdated or incorrect repository URL in the VAMI update settings. This prevents the appliance from successfully fetching the latest update manifests.
Note: For 9.1 the specified URL has been changed and does not require the version at the end of the URL
https://<vcenter-fqdn>:5480.