OWAUserOptions.ps1

function Connect-Exchange { 
    param( 
        [Parameter(Position = 0, Mandatory = $true)] [string]$MailboxName,
        [Parameter(Position = 1, Mandatory = $true)] [System.Management.Automation.PSCredential]$Credentials,
        [Parameter(Position = 2, Mandatory = $false)] [string]$url
    )  
    Begin {
        Load-EWSManagedAPI
		
        ## Set Exchange Version  
        $ExchangeVersion = [Microsoft.Exchange.WebServices.Data.ExchangeVersion]::Exchange2013_SP1
		  
        ## Create Exchange Service Object  
        $service = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService($ExchangeVersion)  
		  
        ## Set Credentials to use two options are availible Option1 to use explict credentials or Option 2 use the Default (logged On) credentials  
		  
        #Credentials Option 1 using UPN for the windows Account  
        #$psCred = Get-Credential  
        $creds = New-Object System.Net.NetworkCredential($Credentials.UserName.ToString(), $Credentials.GetNetworkCredential().password.ToString())  
        $service.Credentials = $creds      
        #Credentials Option 2  
        #service.UseDefaultCredentials = $true  
        #$service.TraceEnabled = $true
        ## Choose to ignore any SSL Warning issues caused by Self Signed Certificates  
		  
        Handle-SSL	
		  
        ## Set the URL of the CAS (Client Access Server) to use two options are availbe to use Autodiscover to find the CAS URL or Hardcode the CAS to use  
		  
        #CAS URL Option 1 Autodiscover  
        if ($url) {
            $uri = [system.URI] $url
            $service.Url = $uri    
        }
        else {
            $service.AutodiscoverUrl($MailboxName, {$true})  
        }
        #Write-host ("Using CAS Server : " + $Service.url)   
		   
        #CAS URL Option 2 Hardcoded  
		  
        #$uri=[system.URI] "https://casservername/ews/exchange.asmx"  
        #$service.Url = $uri    
		  
        ## Optional section for Exchange Impersonation  
		  
        #$service.ImpersonatedUserId = new-object Microsoft.Exchange.WebServices.Data.ImpersonatedUserId([Microsoft.Exchange.WebServices.Data.ConnectingIdType]::SmtpAddress, $MailboxName) 
        if (!$service.URL) {
            throw "Error connecting to EWS"
        }
        else {		
            return, $service
        }
    }
}

function Load-EWSManagedAPI {
    param( 
    )  
    Begin {
        ## Load Managed API dll  
        ###CHECK FOR EWS MANAGED API, IF PRESENT IMPORT THE HIGHEST VERSION EWS DLL, ELSE EXIT
        $EWSDLL = (($(Get-ItemProperty -ErrorAction SilentlyContinue -Path Registry::$(Get-ChildItem -ErrorAction SilentlyContinue -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Exchange\Web Services'|Sort-Object Name -Descending| Select-Object -First 1 -ExpandProperty Name)).'Install Directory') + "Microsoft.Exchange.WebServices.dll")
        if (Test-Path $EWSDLL) {
            Import-Module $EWSDLL
        }
        else {
            "$(get-date -format yyyyMMddHHmmss):"
            "This script requires the EWS Managed API 1.2 or later."
            "Please download and install the current version of the EWS Managed API from"
            "http://go.microsoft.com/fwlink/?LinkId=255472"
            ""
            "Exiting Script."
            exit
        } 
    }
}

function Handle-SSL {
    param( 
    )  
    Begin {
        ## Code From http://poshcode.org/624
        ## Create a compilation environment
        $Provider = New-Object Microsoft.CSharp.CSharpCodeProvider
        $Compiler = $Provider.CreateCompiler()
        $Params = New-Object System.CodeDom.Compiler.CompilerParameters
        $Params.GenerateExecutable = $False
        $Params.GenerateInMemory = $True
        $Params.IncludeDebugInformation = $False
        $Params.ReferencedAssemblies.Add("System.DLL") | Out-Null

        $TASource = @'
  namespace Local.ToolkitExtensions.Net.CertificatePolicy{
    public class TrustAll : System.Net.ICertificatePolicy {
      public TrustAll() { 
      }
      public bool CheckValidationResult(System.Net.ServicePoint sp,
        System.Security.Cryptography.X509Certificates.X509Certificate cert, 
        System.Net.WebRequest req, int problem) {
        return true;
      }
    }
  }
'@ 
        $TAResults = $Provider.CompileAssemblyFromSource($Params, $TASource)
        $TAAssembly = $TAResults.CompiledAssembly

        ## We now create an instance of the TrustAll and attach it to the ServicePointManager
        $TrustAll = $TAAssembly.CreateInstance("Local.ToolkitExtensions.Net.CertificatePolicy.TrustAll")
        [System.Net.ServicePointManager]::CertificatePolicy = $TrustAll

        ## end code from http://poshcode.org/624

    }
}

function Get-OWAUserOptions{ 
    param( 
        [Parameter(Position = 0, Mandatory = $true)] [string]$MailboxName,
        [Parameter(Position = 1, Mandatory = $true)] [System.Management.Automation.PSCredential]$Credentials,
        [Parameter(Position = 2, Mandatory = $false)] [string]$url,
        [Parameter(Position = 3, Mandatory = $false)] [switch]$useImpersonation
    )  
    Begin {
        $service = Connect-Exchange -MailboxName $MailboxName -Credentials $Credentials -url $url
        if ($useImpersonation.IsPresent) {
            $service.ImpersonatedUserId = new-object Microsoft.Exchange.WebServices.Data.ImpersonatedUserId([Microsoft.Exchange.WebServices.Data.ConnectingIdType]::SmtpAddress, $MailboxName)        
        }
         $service.HttpHeaders.Add("X-AnchorMailbox", $MailboxName);  
        $folderid= new-object Microsoft.Exchange.WebServices.Data.FolderId([Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::Root,$MailboxName)     
        #Specify the Root folder for the FAI Item      
        $UsrConfig = [Microsoft.Exchange.WebServices.Data.UserConfiguration]::Bind($service, "OWA.UserOptions", $folderid, [Microsoft.Exchange.WebServices.Data.UserConfigurationProperties]::All)  
        return $UsrConfig.Dictionary
    }
}