Param
    (
        [alias("Group","GN")]
        [string]$GroupName,
        
        [alias("Recursive","R")]
        [switch]$Recurse,
        
        [alias("ReportFile","RF","FileName","File")]
        [string]$Report,
        
        [alias("Display","DisplayMembers","Members","SM")]
        [switch]$ShowMembers = $True
    )
    
Import-Module ActiveDirectory

IF ($GroupMemberReport) { Clear-Variable GroupMemberReport }

$GroupNameDN = (Get-ADGroup -Identity $GroupName).DistinguishedName
Write-Verbose "Enumerating membership for $GroupName ($GroupNameDN) `r "

IF ($Recurse -eq $True)
    {  ## OPEN IF ($Recurse -eq $True) 
        $GroupNameMembers = Get-ADGroupMember -Identity $GroupNameDN -Recursive 
        $GroupNameMembersDirect = Get-ADGroupMember -Identity $GroupNameDN 
        [int]$GroupNameMembersCount = $GroupNameMembers.Count
        [int]$GroupNameMembersDirectCount = $GroupNameMembersDirect.Count
        Write-Output "The group $GroupName has $GroupNameMembersDirectCount direct members and $GroupNameMembersCount total members (includes members of nested groups). `r "
    }  ## CLOSE IF ($Recurse -eq $True)  

IF ($Recurse -eq $False)
    {  ## OPEN IF ($Recurse -eq $False)
        $GroupNameMembers = Get-ADGroupMember -Identity $GroupNameDN 
        [int]$GroupNameMembersCount = $GroupNameMembers.Count
        Write-Output "The group $GroupName has $GroupNameMembersCount direct members (not including nested group members) `r "
    }  ## CLOSE IF ($Recurse -eq $False)

$GroupNameMembers = $GroupNameMembers | sort-object | get-unique
    
ForEach ($GroupNameMembersItem in $GroupNameMembers)
    {  ## OPEN ForEach ($GroupMembersItem in $GroupNameMembers)
        IF ($GroupNameMembersItem.objectClass -eq 'user') { [array]$GroupMembersItemUserList += $GroupNameMembersItem ; Write-Verbose "Adding $GroupMembersItem to members list `r " }    
    }  ## CLOSE ForEach ($GroupMembersItem in $GroupNameMembers)

ForEach ($GroupMembersItemUserListItem in $GroupMembersItemUserList)
    {  ## OPEN ForEach ($GroupMembersItemUserListItem in $GroupMembersItemUserList)
        [array]$GroupMemberReport += Get-ADUser $GroupMembersItemUserListItem -property DisplayName,SAMAccountName,LastLogonDate | Select DisplayName,SAMAccountName,LastLogonDate
    }  ## CLOSE ForEach ($GroupMembersItemUserListItem in $GroupMembersItemUserList)
    
IF ($ShowMembers -eq $True)
    {  ## OPEN IF ($ShowMembers -eq $True)
        $GroupMemberReport
    }  ## CLOSE IF ($ShowMembers -eq $True)
    
IF ($Report)
    {  ## OPEN IF ($Report)
        $GroupMemberReport | export-csv $Report -NoType
    }  ## CLOSE IF ($Report)