Public/New-ADSISite.ps1

function New-ADSISite
{
<#
    .SYNOPSIS
        Function to create a new Site
     
    .DESCRIPTION
        Function to create a new Site
     
    .PARAMETER SiteName
        Specifies the SiteName
     
    .PARAMETER Location
        Specifies the Location of the site
     
    .PARAMETER Credential
        Specifies the alternative credential to use.
        By default it will use the current user windows credentials.
     
    .PARAMETER ForestName
        Specifies the alternative Forest where the subnet should be created
        By default it will use the current forest.
     
    .EXAMPLE
        PS C:\> New-ADSISite -SiteName "MTL01" -Location "Montreal, QC, Canada"
     
    .NOTES
        Francois-Xavier.Cat
        LazyWinAdmin.com
        @lazywinadm
        github.com/lazywinadmin
     
    .LINK
        https://msdn.microsoft.com/en-us/library/system.directoryservices.activedirectory.activedirectorysite(v=vs.110).aspx
#>

    
    [CmdletBinding(SupportsShouldProcess = $true)]
    param
    (
        [Parameter(Mandatory = $true)]
        [Alias('Name')]
        [String]$SiteName,

        [String]$Location,

        [Alias("RunAs")]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty,

        [String]$ForestName
    )
    
    BEGIN
    {
        Add-Type -AssemblyName System.DirectoryServices.AccountManagement
        
        # Create Context splatting
        $ContextSplatting = @{ ContextType = "Forest" }
        
        IF ($PSBoundParameters['Credential']) { $ContextSplatting.Credential = $Credential }
        IF ($PSBoundParameters['ForestName']) { $ContextSplatting.ForestName = $ForestName }
        
        $Context = New-ADSIDirectoryContext @ContextSplatting
    }
    PROCESS
    {
        TRY
        {
            IF ($PSCmdlet.ShouldProcess($SiteName, "Create Site"))
            {
                $Site = New-Object -TypeName System.DirectoryServices.ActiveDirectory.ActiveDirectorySite -ArgumentList $Context, $SiteName
                $Site.Location = $Location
                $Site.Save()
                
                #$site.GetDirectoryEntry()
            }
        }
        CATCH
        {
            Write-Error $Error[0]
            break
        }
    }
    END
    {
    }
}