Earlier when we query a ESXi host for HostSystemInfo for the details of Cisco UCS Blade on which the said host is installed, it used to return the proper UUID of the blade as seen on the Cisco UCS Manager, recently (for SMBIOS 2.6 and above ie M3 and M4 Cisco Blades) the blade UUID returned by the ESXi Host doesn't match with the one on the UCS Manager.
For Eg:
If the Blade on UCS Manager has UUID like 'uuid = b5250000-0900-0000-0001-000000000003'
the ESXi Host retunrs an uuid in the jumbled up format like 'uuid = 000025b5-0009-0000-0001-000000000003'