Writes a KVP (i.e. adds a new one, updates the value of an existing one or deletes an existing one) from the host to a certain VM.
Add or update a KVP:
Write-HostKVP -VMName -Name -Value [-Force]
Remove a KVP:
Write-HostKVP -VMName -Name -Remove [-Force]
The -Force switch tell the cmdlet to perform an actual write operation. If the KVP is found but the -Force parameter is not specified, the cmdlet will issue a warning.