Powershell script to map a drive.

First, the target folder seems to start with a @ - is that correct?
Cutting off the wrm prefix is done by using

$myCredential.UserName.substring(3)

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Is the password required? That is, username and/or password do not match between local and remote PC?

Right.  The local PC is a generic account with Single Sign on.  The user logs into Single Sign On but doesn't have access to their files.  I'm trying to map their user drives

Then your drive mapping command could look like this:

New-PSDrive –Name 'N' –PSProvider FileSystem -Credential $myCredential `
            –Root "\\wrmsfs01\users\$($myCredential.UserName.substring(3))"

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OK I will try thanks.

Not doing it.  Somehow I need to copy the user name and take off the wrm and map it

This is where I'm at

cmdlet Get-Credential at command pipeline position 1
Supply values for the following parameters:
New-PSDrive : A positional parameter cannot be found that accepts argument '\\wrmsfs01\users\rosnei'.
At C:\Users\wrmrosnei\Desktop\LoginNDrive.ps1:3 char:1
+ New-PSDrive –Name 'N' –PSProvider FileSystem -Credential $myCredentia ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidArgument: (:) [New-PSDrive], ParameterBindingException
    + FullyQualifiedErrorId : PositionalParameterNotFound,Microsoft.PowerShell.Commands.NewPSDriveComma
cmdlet Get-Credential at command pipeline position 1
Supply values for the following parameters:
This is what should map -  New-PSDrive : A positional parameter cannot be found that accepts argument '\\wrmsfs01\users\rosnei'.
At C:\Users\wrmrosnei\Desktop\LoginNDrive.ps1:3 char:1
+ New-PSDrive –Name 'N' –PSProvider FileSystem -Credential $myCredentia ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidArgument: (:) [New-PSDrive], ParameterBindingException
    + FullyQualifiedErrorId : PositionalParameterNotFound,Microsoft.PowerShell.Commands.NewPSDriveCommand

I cannot see how the code posted can lead to those errors. Please repost what you used.

I'm trying to use this.  It works on a machine that the actual use is logged into. however, with the generic account and SSO it's trying to use the generic account to map.  I'm trying to get it to copy the Crediental provided and remove the 1st 3 letters. I got it to work with a bat file and a %var but you can't encrypt the password so i can't use it.

Get-PSDrive N |Remove-PS-Drive
$MyCredential = Get-Credential
Get-PSDrive –Name 'N' –PSProvider FileSystem -Credential $myCredential
New-PSDrive -Name "N" -PSProvider FileSystem -Root "\\wrmsfs01\users\$($env:username.substring(3))"

This is the actual script I started with but it doesn't cut the user name - the user name starts with wrm and the home drive does not.
On Error Resume Next
Dim strPassword, strHomeDrivePath, objNetwork, colDrives, i, WshNetwork, strUser
Set objNetwork = CreateObject("Wscript.Network")
Set WshNetwork = CreateObject("WScript.Network")
strPassword = "{VAR SSOPWD}"
strUser = "corp\" & "{VAR SSOUSR}"
strHomeDrivePath = "\\wrmsfs01\users$$\" & "{VAR SSOUSR}"

There are several issues.
* Look closely at the error message: the "-" in front of "Name" and "PSProvider" are not the required "minus" (ASCII 45), but long dashes (compare with the one in "New-PSDrive").
* The cmdlet to remove a mapped drive is Remove-PSDrive, not Remove-PS-Drive
* The Get-PSDrive will fail, since there is no drive named N, and is not needed at all.
* The credentials need to be passed in New-PSDrive.
* Assuming you want to use the drive in Explorer as well, you need the "-Persist" and "-Scope Global" arguments.

$drive = 'N'
$myCredential = Get-Credential
If ($myCredential) {
	Remove-PSDrive -Name $drive -ErrorAction SilentlyContinue
	New-PSDrive -Name $drive -PSProvider FileSystem -Root "\\wrmsfs01\users\$($env:username -replace '^wrm')" -Scope Global -Persist -Credential $myCredential
}

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PS C:\Users\wrmns2west\Desktop> $drive = 'N'
$myCredential = Get-Credential
If ($myCredential) {
      Remove-PSDrive -Name $drive -ErrorAction SilentlyContinue
      New-PSDrive -Name $drive -PSProvider FileSystem -Root "\\wrmsfs01\users\$($env:username -replace '^wrm')" -Scope Global -Persist -Credential $myCredential
}
cmdlet Get-Credential at command pipeline position 1
Supply values for the following parameters:
New-PSDrive : The specified network resource or device is no longer available
At line:5 char:2
+     New-PSDrive -Name $drive -PSProvider FileSystem -Root "\\wrmsfs01 ...
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (N:PSDriveInfo) [New-PSDrive], Win32Exception
    + FullyQualifiedErrorId : CouldNotMapNetworkDrive,Microsoft.PowerShell.Commands.NewPSDriveCommand

As I posted already, you need to use

$myCredential.UserName

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instead of

$env:username

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because otherwise you map the "SSO" user's folder instead of individual ones.

Thank you so much!!!!