EWS Not returning folder permissions - powershell

Question

any ideas as to why this ews managed api in powershell keeps returning a 0 folder count and no permissions? i'm using impersonation, it's returning the folder names but no permissions.
function GetPerms{
param([string]$mailboxaddress)
$enumSmtpAddress = [Microsoft.Exchange.WebServices.Data.ConnectingIdType]::SmtpAddress
$global:service.ImpersonatedUserId = New-Object Microsoft.Exchange.WebServices.Data.ImpersonatedUserId($enumSmtpAddress,$mailboxaddress);
$mailbox = New-Object Microsoft.Exchange.WebServices.Data.Mailbox($mailboxaddress)
$FolderID = New-Object Microsoft.Exchange.WebServices.Data.FolderId([Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::MsgFolderRoot,$mailbox)
$FolderRoot = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($global:service,$FolderID);
$FolderView = New-Object Microsoft.Exchange.WebServices.Data.FolderView(10000)
$FolderView.Traversal = [Microsoft.Exchange.WebServices.Data.FolderTraversal]::Deep
$findfolders = $FolderRoot.FindFolders($FolderView);
foreach ($folder in $findfolders.Folders){
$id = New-Object Microsoft.Exchange.WebServices.Data.FolderId($folder.Id.UniqueId.ToString())
$fld = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($global:service,$id);
$perms = $fld.Permissions
[int]$permcount = $fld.Permissions.Count
write-host $permcount
write-host $fld.Displayname, $fld.Permissions.Count
foreach($f in $fld.Permisions.UserID.PrimarySmtpAddress){
write-host $f
}
for($t=0;$t -le $perms.Count; $t++){
[string]$displayname = $fld.Permissions[$t].UserId.DisplayName
[string]$smtp = $fld.Permissions[$t].UserId.PrimarySmtpAddress
#write-host $mailboxaddress,$fld.DisplayName,$smtp
}
}
}

Answer 1

You need request that Exchange return the Folder Permissions with a PropertySet eg
$psPropset= new-object Microsoft.Exchange.WebServices.Data.PropertySet([Microsoft.Exchange.WebServices.Data.BasePropertySet]::FirstClassProperties)
$psPropset.Add([Microsoft.Exchange.WebServices.Data.FolderSchema]::Permissions)
$fld = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($global:service,$id,$psPropset);
And that should then return the permissions
Cheers
Glen