Thank you @LucD . I was able to add that to the script and it worked, however the export had empty rows. Also, I believe a reload command is needed after updating the syslog server and port, and also the syslog ESXi firewall to prevent having to reboot. So I added more lines to the script. I am currently getting the following error when I run it, and I have tried various things but am still getting similar errors:

At line:29 char:3
+         $esxcli.network.firewall.refresh.Invoke(@{rulesetid='syslog'; ...
+         ~~~~~~~
Missing closing ')' after expression in 'if' statement.
    + CategoryInfo          : ParserError: (:) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : MissingEndParenthesisAfterStatement

 Below is the script. I basically want it to perform the reloads I mentioned above, and also if possible, export the new firewall ruleset value as well. Thanks. 

Get-VMHost -PipelineVariable esx |
ForEach-Object -Process {
    $sLog = @{
        loghost = 'tcp://server.com:1514'
    }
    $esxcli = Get-EsxCli -VMHost $esx -V2
    $old = $esxcli.system.syslog.config.get.Invoke()
    $old2 = $esxcli.network.firewall.ruleset.list.Invoke(@{rulesetid='syslog'}) 
    if($esxcli.system.syslog.config.set.Invoke($sLog)){
	$esxcli.system.syslog.reload.invoke($sLog)
		if(($esxcli.network.firewall.ruleset.set.Invoke(@{rulesetid='syslog'; enabled=$true}))
		$esxcli.network.firewall.refresh.Invoke(@{rulesetid='syslog'; enabled=$true})
			New-Object -TypeName PSObject -Property ([ordered]@{
				vCenter = ([uri]$esx.ExtensionData.Client.ServiceUrl).Host
				VMHost = $esx.Name
				SyslogOld = $old.RemoteHost
				SyslogNew = $esxcli.system.syslog.config.get.Invoke().RemoteHost
				FirewallRulesetNew = $esxcli.network.firewall.ruleset.list.Invoke(@{rulesetid='syslog'}).RemoteHost
				})
			}
		}
     else{
        Write-Error "Syslog configuration failed on $($esx.Name)"
} | Export-Csv -Path "c:\file.csv" -NoTypeInformation -UseCulture