If the vCloud Director appliance deployment fails or if the appliance is not operating properly, you can examine the appliance log files to determine the cause of the problem.

VMware Technical Support routinely requests diagnostic information handling support requests. You can use the vmware-vcd-support script to collect host log information, and vCloud Director logs. For more information about collecting diagnostic information for vCloud Director, see https://kb.vmware.com/s/article/1026312. When running the vmware-vcd-support script, the logs might include information about decommissioned or replaced cells with status FAIL. See, https://kb.vmware.com/s/article/71349.