We upgraded from ESX 2.5 to Vsphere 5, after logging into the Vsphere 5 Web Client I was prompted with a error that stated it couldn’t find the Inventory Service. Here are the steps to resolve that issue.

– Stop the vCenter Inventory Service.

– From the Windows Start menu, select Administrative Tools > Services.

– Right-click vCenter Inventory Service and select Stop.

– Open a command prompt.

– Delete the entire contents of the Inventory_Service_Directory/data directory.

– The location of the Inventory Service directory is specified during the vCenter Server installation.

– Change directory to Inventory_Service_directory/scripts

For example, if you installed vCenter Inventory Service in the default location, run    this command.

cd /Program Files/VMware/Infrastructure/Inventory Service/scripts

– Run the createDB.bat command, with no arguments, to reset the vCenter Inventory Service database.

– Run the register.bat command to update the stored configuration information of the Inventory Service.

register.bat current_vCenter_Server_fully_qualified_domain_name vCenter_Server_HTTPS_port

For example, if the vCenter Server fully qualified domain name is machinename.corp.com and the HTTPS port is 443, run this command.

register.bat machinename.corp.com 443

– Restart the vCenter Inventory Service and Vsphere Web Client