Turning off the Reading / Preview Pane on all folders in OWA in Exchange 2013 and Exchange Online in EWS with Powershell

Exchange 2013 and Exchange Online has a cool new feature in OWA to let you control the Reading pane setting on all folders in your Mailbox in OWA eg. (in previous versions you had to manage it yourself per folder).

When you set this setting in OWA and check the "Apply to all folders" box, in your mailbox it sets a configuration setting called GlobalReadingPanePosition in the OWA.UserOptions FAI (Folder Associated Item) in the Non_IPM Root of your Mailbox. The following values control the position of the Reading Pane on all folders

0 - Hides the Reading Pane
1 - Shows the Reading Pane on the Rights (this is the default)
2 - Shows the Reading Pane at the bottom

To Access this FAI Item in EWS you use the UserConfiguration class which makes accessing the Roaming Dictionary structure where this particular value is held really easy. Eg the following script will turn the Reading pane off on all Folders in the mailbox its ran against. I've put a download of this script here the code itself looks like

1. ## Get the Mailbox to Access from the 1st commandline argument  
2.   
3. $MailboxName = $args[0]  
4.   
5. ## Load Managed API dll    
6. Add-Type -Path "C:\Program Files\Microsoft\Exchange\Web Services\2.0\Microsoft.Exchange.WebServices.dll"    
7.     
8. ## Set Exchange Version    
9. $ExchangeVersion = [Microsoft.Exchange.WebServices.Data.ExchangeVersion]::Exchange2010_SP2    
10.     
11. ## Create Exchange Service Object    
12. $service = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService($ExchangeVersion)    
13.     
14. ## Set Credentials to use two options are availible Option1 to use explict credentials or Option 2 use the Default (logged On) credentials    
15.     
16. #Credentials Option 1 using UPN for the windows Account    
17. $psCred = Get-Credential    
18. $creds = New-Object System.Net.NetworkCredential($psCred.UserName.ToString(),$psCred.GetNetworkCredential().password.ToString())    
19. $service.Credentials = $creds        
20.     
21. #Credentials Option 2    
22. #service.UseDefaultCredentials = $true    
23.     
24. ## Choose to ignore any SSL Warning issues caused by Self Signed Certificates    
25.     
26. ## Code From http://poshcode.org/624  
27. ## Create a compilation environment  
28. $Provider=New-Object Microsoft.CSharp.CSharpCodeProvider  
29. $Compiler=$Provider.CreateCompiler()  
30. $Params=New-Object System.CodeDom.Compiler.CompilerParameters  
31. $Params.GenerateExecutable=$False  
32. $Params.GenerateInMemory=$True  
33. $Params.IncludeDebugInformation=$False  
34. $Params.ReferencedAssemblies.Add("System.DLL") | Out-Null  
35.   
36. $TASource=@' 
37.   namespace Local.ToolkitExtensions.Net.CertificatePolicy{ 
38.     public class TrustAll : System.Net.ICertificatePolicy { 
39.       public TrustAll() {  
40.       } 
41.       public bool CheckValidationResult(System.Net.ServicePoint sp, 
42.         System.Security.Cryptography.X509Certificates.X509Certificate cert,  
43.         System.Net.WebRequest req, int problem) { 
44.         return true; 
45.       } 
46.     } 
47.   } 
48. '@   
49. $TAResults=$Provider.CompileAssemblyFromSource($Params,$TASource)  
50. $TAAssembly=$TAResults.CompiledAssembly  
51.   
52. ## We now create an instance of the TrustAll and attach it to the ServicePointManager  
53. $TrustAll=$TAAssembly.CreateInstance("Local.ToolkitExtensions.Net.CertificatePolicy.TrustAll")  
54. [System.Net.ServicePointManager]::CertificatePolicy=$TrustAll  
55.   
56. ## end code from http://poshcode.org/624  
57.     
58. ## 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    
59.     
60. #CAS URL Option 1 Autodiscover    
61. $service.AutodiscoverUrl($MailboxName,{$true})    
62. "Using CAS Server : " + $Service.url     
63.      
64. #CAS URL Option 2 Hardcoded    
65.     
66. #$uri=[system.URI] "https://casservername/ews/exchange.asmx"    
67. #$service.Url = $uri      
68.     
69. ## Optional section for Exchange Impersonation    
70.     
71. #$service.ImpersonatedUserId = new-object Microsoft.Exchange.WebServices.Data.ImpersonatedUserId([Microsoft.Exchange.WebServices.Data.ConnectingIdType]::SmtpAddress, $MailboxName)   
72.   
73. $folderid= new-object Microsoft.Exchange.WebServices.Data.FolderId([Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::Root,$MailboxName)       
74. #Specify the Root folder where the FAI Item is    
75. $UsrConfig = [Microsoft.Exchange.WebServices.Data.UserConfiguration]::Bind($service, "OWA.UserOptions", $folderid, [Microsoft.Exchange.WebServices.Data.UserConfigurationProperties]::All)    
76. if($UsrConfig.Dictionary.ContainsKey("GlobalReadingPanePosition")){    
77.     $UsrConfig.Dictionary["GlobalReadingPanePosition"] = 0    
78. }    
79. else{    
80.     $UsrConfig.Dictionary.Add("GlobalReadingPanePosition",0)    
81. }  
82. $UsrConfig.Update()    
83. "Item updated"