Baselines are based on metadata that Update Manager downloads from the VMware and third-party Web sites.


Updates for virtual appliances and ESX/ESXi hosts might be unavailable.


  • Misconfigured Web server proxy.
  • Third-party servers are unavailable.
  • VMware update service is unavailable.
  • Poor network connectivity.


  • Check the connectivity settings. For more information, see Change the Update Manager Network Settings.
  • Check the third-party Web sites to determine whether they are available.
  • Check the VMware Web site ( to determine whether it is available.
  • Check whether other applications that use networking are functioning as expected. Consult your network administrator to best assess whether the network is working as expected.