VMware ESX 3.5 Update Manager Failure

If you are suddenly (June 2011) unable to Scan for Updates or Remediate VMware ESX 3.5 Hosts, you may be without ESX350-201012410-BG (VMware KB 1030001). When running ESXUpdate via SSH on the host, you'll receive an Integrity Error that includes "Signature 0BFA1C860F0B0A6CF5CD5D2AEE7835B14789B619: keyExpired: 4789B619" To resolve this, you'll need to bypass the Signature Requirement for patching so the new Secure Key Patch can be applied. To do this, connect via SSH to the host, and run the following command. esxupdate -d http://patchdepoturlhere --nosig update This will install all upd