We are in the process of migrating two file servers to a new server. We have mapped drives via user group in group policy. Many users have manually mapped drives and we need to find these mappings. I have created a PowerShell script to run that remotely get the drive mappings. It works on most computers but there are many that are not returning results and I am not getting any error messages. Each workstation on the list creates a text file and the ones that are not returning results have no text in the files. I can ping these machines. If the machine is not turned on, it does come up error message that the RPC server is not available. My domain user account is in a group that is in the local admin account. I have no idea why some are not working.

Here is the script.

# Load list into variable, which will become an array of strings

If( !(Test-Path C:\Scripts)) { New-Item C:\Scripts -ItemType directory }
If( !(Test-Path C:\Scripts\Computers)) { New-Item C:\Scripts\Computers -ItemType directory }
If( !(Test-Path C:\Scripts\Workstations.txt)) { "No Workstations found. Please enter a list of Workstations under Workstation.txt"; Return}
If( !(Test-Path C:\Scripts\KnownMaps.txt)) { "No Mapping to check against. Please enter a list of Known Mappings under KnownMaps.txt"; Return}

$computerlist = Get-Content C:\Scripts\Workstations.txt

# Loop through each item in the array (each computer in the list of computers we loaded into the variable)
ForEach ($computer in $computerlist)
{

   $diskObject =  Get-WmiObject Win32_MappedLogicalDisk -computerName $computer | Select Name,ProviderName | Out-File C:\Tester\Computers\$computer.txt -width 200

}

Select-String -Path C:\Tester\Computers\*.txt -Pattern cmsfiles | Out-File C:\Tester\Drivemaps-all.txt

$strings = Get-Content C:\Tester\KnownMaps.txt

Select-String -Path C:\Tester\Drivemaps-all.txt -Pattern $strings -notmatch -simplematch | Out-File C:\Tester\Drivemaps-nonmatch.txt -Width 200
Select-String -Path C:\Tester\Drivemaps-all.txt -Pattern $strings -simplematch | Out-File C:\Tester\Drivemaps-match.txt -Width 200