Symptoms:
When customizing a VM during cloning, failure of Guest OS Customization may occur if there are changes to the network configuration such as adding additional NIC's or creating a new vSwitch during cloning.
When reviewing sysprep logs, you may see the following errors:
2023-03-27 14:30:26, Info [NETIOUGC.EXE] TCPIP: Transition to context 2 accepted for key 'Interfaces'.
2023-03-27 14:30:26, Error [NETIOUGC.EXE] TCPIP: Unable to transition to subkey '<MAC_ADDRESS> (under 'Interfaces'): 0x57.
2023-03-27 14:30:26, Error [NETIOUGC.EXE] TCPIP: Error processing subkeys under 'Interfaces' registry key: 0x57.
2023-03-27 14:30:26, Error [NETIOUGC.EXE] TCPIP: Error while processing the the 'Interfaces' registry key.
2023-03-27 14:30:26, Info [NETIOUGC.EXE] TCPIP: Returning from context 2 ('Interfaces') to context 1 ('Software\Microsoft\Windows NT\CurrentVersion\UnattendSettings\Netio').
Note that <MAC_ADDRESS> will contain the MAC for the VM in question.