[ADSI]$Grp="LDAP://CN=SAPIEN Authors,OU=SAPIEN,DC=MyCompany,DC=local"
$NewUserDN="CN=Jeffery Hicks,OU=IT,OU=Employees,DC=MyCompany,DC=local"

#create an array object from current group members
$grpMembers=@($Grp.Member)

#display current group membership
Write-Host "There are currently $($grpMembers.Count) members in $($Grp.Name)" -foregroundcolor cyan
foreach ($user in $grpMembers) {$user}

Write-Host `n; Write-Host "Adding $NewUserDN" -foregroundcolor cyan
($grp.Member).add($NewUserDN) > $NULL

#commit changes to Active Directory
$Grp.SetInfo()

#refresh object and display new membership list
$Grp.refreshCache()
$grpMembers=@($grp.Member)

#display new membership
Write-Host "There are now $($grpMembers.Count) members in $($grp.Name)" -foregroundcolor cyan
foreach ($user in $grpMembers) {
 if ($user -eq $NewUserDN) { 
 Write-Host $user -foregroundcolor Green
 }
 else
 {
 write-Host $user -foregroundcolor Yellow
 }
}