No Valid Module File Was Found

In some cases, you may see the following error message when you try to import a PowerShell module:

Import-Module : The specified module 'Microsoft.Graph' was not loaded because
  no valid module file was found in any module directory.
At line:1 char:1
+ Import-Module Microsoft.Graph
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ResourceUnavailable: (Microsoft.Graph:String)
      [Import-Module], FileNotFoundException
    + FullyQualifiedErrorId : Modules_ModuleNotFound,Microsoft.PowerShell.
      Commands.ImportModuleCommand

Typically, two issues may cause this error message:

The module is not installed on your system.
Your PowerShell path is incorrect.

Take the following steps to find the root cause of the error message “no valid module file was found.”

Is the Module Installed On Your System?

PowerShell modules are installed in one of two folders:

Modules installed in admin mode are placed in the %ProgramFiles%\WindowsPowerShell\Modules folder.

Modules installed in user mode are placed in the %UserProfile%\Documents\WindowsPowerShell\Modules folder.

Please note that you can install PowerShell modules side-by-side in these two folders. However, if you install different versions side-by-side, you can really get into trouble. Read this article for more info on this.

Verify if the module you’re trying to import is in either of the two module folders.

You can also search for the installed modules on your system using the Get-Module CmdLet (looking for the Microsoft Graph module):

PS C:\> Get-Module -ListAvailable -Name *graph*

    Directory: C:\Program Files\WindowsPowerShell\Modules

ModuleType Version    Name                                ExportedCommands
---------- -------    ----                                ----------------
Manifest   1.22.0     Microsoft.Graph
Script     1.22.0     Microsoft.Graph.Applications        {Add-MgApplicationKey, Add...
Script     1.22.0     Microsoft.Graph.Authentication      {Connect-MgGraph, Disconne...
Script     1.22.0     Microsoft.Graph.Bookings            {Get-MgBookingBusiness, Ge...
Script     1.22.0     Microsoft.Graph.Calendar            {Get-MgGroupCalendar, Get-...
Script     1.22.0     Microsoft.Graph.ChangeNotifications {Get-MgSubscription, Invok...
Script     1.22.0     Microsoft.Graph.CloudCommunications {Add-MgCommunicationCallLa...
Script     1.22.0     Microsoft.Graph.Compliance          {Add-MgComplianceEdiscover...
Script     1.22.0     Microsoft.Graph.CrossDeviceExper... {Get-MgUserActivity, Get-M...
Script     1.22.0     Microsoft.Graph.DeviceManagement    {Get-MgDeviceManagement, G...
...

(partial output)

Has Your PowerShell Path Been Modified?

If the module is installed correctly, the next step should be to verify if your PowerShell path has been modified.

The PowerShell path should look similar to the following:

PS C:\> $env:PSModulePath
C:\Users\Skrubbeltrang\Documents\WindowsPowerShell\Modules;
C:\Program Files\WindowsPowerShell\Modules;
C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules

The path should include the user mode modules and the admin mode modules, as well as a third path in the system folder.

You can modify your PowerShell path via advanced system settings. Run the command “SystemPropertiesAdvanced” and click on “Environment Variables”:

Then select PSModulePath in System variables and click Edit:

You can then modify the PowerShell Path. Make sure to use system variables when editing the values:

When you have modified the PowerShell path, you must restart your PowerShell session before the changes take effect.

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