How to change LogFile.Directory property via WMI on a remote computer? - iis-7

Question

I was able to retrieve, using WMI, the value of LogFile.Directory for a specific IIS site located on a remote computer.
Now I need to change the LogFile.Directory property - this is a step in an automation process - but I am hitting a wall. This is what I have so far, although it doesn't work.
Write-Output "Making IIS connection to $($XmlCloudNodeFullyQualifiedDomainName)"
$site = Get-WmiObject -ComputerName $XmlCloudNodeFullyQualifiedDomainName -Namespace "root/webadministration" -Class Site -Authentication 6 -Filter "Name = '$IISSiteName'"
If ($site.Name -eq $IISSiteName) {
Write-Output "Found site $IISSiteName"
Write-Output ("Existing log folder: " + $site.LogFile.Directory)
$newLogFolder = "E:\" + $IISSiteName + "\logs"
Write-Output ("Set IIS log folder to " + $newLogFolder)
$site.LogFile.Directory = $newLogFolder
$site.Put()
}
I don't get any errors. Simply the LogFile.Directory value does not change on the remote machine when I check in IIS Manager.
I've read that I should be using Set-WMIInstance instead, so I tried:
Write-Verbose "Making IIS connection to $($XmlCloudNodeFullyQualifiedDomainName)"
$site = Get-WmiObject -ComputerName $XmlCloudNodeFullyQualifiedDomainName -Namespace "root/webadministration" -Class Site -Authentication 6 -Filter "Name = '$IISSiteName'"
$sitePath = (Get-WmiObject -ComputerName $XmlCloudNodeFullyQualifiedDomainName -Namespace "root/webadministration" -Class Site -Authentication 6 -Filter "Name = '$IISSiteName'").__path
If ($site.Name -eq $IISSiteName) {
Write-Output "Found site $IISSiteName"
$newLogFolder = "E:\" + $IISSiteName + "\logs"
Write-Output ("Existing log folder: " + $site.LogFile.Directory)
Set-WmiInstance -Path $sitePath -argument #{LogFile.Directory = $newLogFolder}
Write-Output ("Set IIS log folder to " + $newLogFolder)
}
But this throws errors:
At E:\\Test.ps1:71 char:54
+ Set-WmiInstance -Path $sitePath #{LogFile.Directory = $newLogFolder}
+ ~
Missing '=' operator after key in hash literal.
At E:\\Test.ps1:72 char:18
+ Write-Output ("Set IIS log folder to " + $newLogFolder)
+ ~
Missing '=' operator after key in hash literal.
At E:\\Test.ps1:41 char:54
+ foreach ($FSMappingNode in $FSMappingNodesArray) {
+ ~
Is there a way to change this particular value remotely or is it a read-only property?
Any help would be greatly appreciated.
Thanks,
// Francesco

Answer 1

After much tinkering, I finally found the way to change the LogFile.Directory of an IIS site remotely:
Write-Output "Making IIS connection to $($XmlCloudNodeFullyQualifiedDomainName)"
$site = Get-WmiObject -ComputerName $XmlCloudNodeFullyQualifiedDomainName -Namespace "root/webadministration" -Class Site -Authentication 6 -Filter "Name = '$IISSiteName'"
$sitePath = $site.__path
Write-Verbose $sitePath
If ($site.Name -eq $IISSiteName) {
Write-Output "Found site $IISSiteName"
Write-Verbose ("Existing log folder: " + $site.LogFile.Directory)
$newLogFolder = "E:\" + $IISSiteName + "\logs"
$siteLogFile = $site.LogFile
$siteLogFile.Directory = $newLogFolder
Set-WmiInstance -Path $sitePath -Arguments #{LogFile = $siteLogFile}
Write-Output ("Set IIS log folder to " + $siteLogFile.Directory)
}