VMware devices not discovered or intermittently discovered
Discovery may not update vmware configuration items (CIs) as expected in the configuration management database (CMDB) due to the correlation being carried out against the BIOS Serial Number. This can cause vmware CI devices to either not be discovered or only intermittently discovered.
VMware has a known issue that allows the same BIOS Serial Number for multiple virtual machines (VMs) to be returned.
VMware has a documented workaround for this issue. For information, refer to BIOS UUIDs in vCloud Director are not unique when virtual machines are deployed from catalog templates (2002506) in the VMware knowledge base.