Remote execution with exchange powershell

The error indicates that the remote runspace is configured with NoLanguage mode, which restricts executing PowerShell scripts or complex expressions like ScriptBlock

Instead of using Invoke-Command directly, establish a PowerShell remote session to the Exchange server using New-PSSession and execute your commands within that session.

# Create a remote session
$Session = New-PSSession -ConfigurationName Microsoft.Exchange `
    -ConnectionUri http://srvwex.company.local/powershell `
    -Credential $sourceCred

# Import the session
Import-PSSession $Session -DisableNameChecking

# Fetch the primary SMTP addresses of members in the distribution group
$DistributionGroup = "YourDistributionGroupAlias"  # Replace with your DG alias
$Members = Get-DistributionGroupMember -Identity $DistributionGroup | Select-Object PrimarySmtpAddress

# Display the result
$Members

# Remove the session after use
Remove-PSSession $Session



If you must use Invoke-Command, avoid using nested ScriptBlocks or complex expressions. Run each command in a simpler format, passing arguments directly:

# Parameters for Invoke-Command
$parameters = @{
    ConfigurationName = 'Microsoft.Exchange'
    ConnectionUri     = 'http://srvwex.company.local/powershell'
    Credential        = $sourceCred
    ScriptBlock       = {
        param($DG)
        Get-DistributionGroupMember -Identity $DG | Select-Object -ExpandProperty PrimarySmtpAddress
    }
    ArgumentList      = $DG.Alias
}

# Execute the command
$RemoteMembership = Invoke-Command @parameters

# Display results
$RemoteMembership

Implicit remoting imports remote Exchange commands into your local session without needing to switch contexts repeatedly.

# Create and import remote session
$Session = New-PSSession -ConfigurationName Microsoft.Exchange `
    -ConnectionUri http://srvwex.company.local/powershell `
    -Credential $sourceCred

Import-PSSession $Session -Prefix Remote

# Use the imported remote commands
$DG = "YourDistributionGroupAlias"
$Members = Get-RemoteDistributionGroupMember -Identity $DG | Select-Object PrimarySmtpAddress

# Display results
$Members

# Remove session
Remove-PSSession $Session


On the remote Exchange server, check the language mode of the session (if having admin privileges on exchange server) :

Get-PSSessionConfiguration -Name Microsoft.Exchange



Update it to FullLanguage mode (not recommended in production environments unless necessary):
Set-PSSessionConfiguration -Name Microsoft.Exchange -LanguageMode FullLanguage



Restart the WinRM service on the remote server:  Restart-Service WinRM



If modifying the remote runspace isn't an option, create a proxy script to execute the desired command locally on the remote Exchange server and return the results. Save the script on the remote server and invoke it remotely:

Save the following script on the remote server:

# Proxy script on remote Exchange server
param([string]$DGAlias)
Get-DistributionGroup $DGAlias | Get-DistributionGroupMember | Select-Object PrimarySmtpAddress


Invoke the script remotely:
Invoke-Command -ComputerName srvwex.company.local `
    -Credential $sourceCred `
    -ScriptBlock { & "C:\Scripts\Get-DGMembers.ps1" -DGAlias $using:DG }