[CmdletBinding()]
param (
    [string]
    $Server
)

. .\Variables.ps1
if($PSBoundParameters.ContainsKey("Server")){
    Get-ADGroup -Server $Server -SearchBase $Projects -Filter 'GroupCategory -eq "Security"'
} else {
    Get-ADGroup -SearchBase $Projects -Filter 'GroupCategory -eq "Security"'
}