Public/Get-MDSConfiguration.ps1

function Get-MDSConfiguration {
    <#
    .SYNOPSIS
    Set module configuration variables

    .DESCRIPTION
    Some functions in the module require variables that are unique to the environment. This function displays the configuration variables.

    .EXAMPLE
    Get-MDSConfiguration

    List the module configuration file

    .NOTES
    Uses the 'Configuration' module by Joel Bennett (https://www.powershellgallery.com/packages/Configuration)

    #>

    [cmdletbinding()]
    param(
        [ValidateSet("ADConnectServer","SkypeOnPremServer","ErrorTest")]
        [Parameter()]
        [String]$Setting
        )

    begin {}
    process {
        $Configuration = Import-Configuration
        
        If ($Setting) {
            $ConfigSetting = $Configuration[$Setting]
            If (-not $ConfigSetting) {
                Throw "The module configuration does not have $Setting configured. Use 'Set-MDSConfiguration -Name $Setting -Value <string>' to configure your settings."
            }
            Return $ConfigSetting
        }
        
        If ($Configuration.count -eq 0) {
            Throw "Thank you for using the MDS Tools module. Please run Set-MDSConfiguration to configure the module settings."
        }

        Return $Configuration
    }
    end {}

}