Tuesday, January 28, 2014

Accessing a User's Shared Contacts Folders in EWS

A while back I posted a sample of creating a Shortcut to a Shared Calendar folder using EWS here . In this post I'll look at how you can do the inverse which is reading and accessing the folders associated with these shortcuts. A users Shared Contacts folder's will appear like the following in Outlook


These Shortcuts are special items that are saved in the Common Views folder in the Non_IPM_Subtree of a mailbox. The data for the shortcut item is saved in a number of properties which are documented in the following Exchange protocol document http://msdn.microsoft.com/en-us/library/ee157359(v=exchg.80).aspx

So to access these shortcuts from EWS requires a few different operations, the first is you need to use a FindFolder operation on the Root of the Mailbox to located the CommonViews Folder. Once you have the CommonViews FolderId you then use the FindItems operation to find any of the Items where the PidTagWlinkGroupName is set to Shared Contacts, which will effectively filter the items returned just to the shared contacts (note at this point if you are using a localized version of Outlook you need to use the localized text name for the node).

Once you have access to the ShortCut Items the next step is to read the PidTagWlinkStoreEntryId property from the ShortCut item. To get the mailbox that this shortcut refers to you can extract the X500 address from StoreId format which is documented here . You can resolve the X500 Address to an SMTP address using the resolveName operation and then use the SMTP address bind to the shared Contacts folder normally in EWS.

I've posted a sample powershell script to access and query all the Shared Contact folders in a Mailbox 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. #PropDefs   
  72. $pidTagStoreEntryId = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(4091, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Binary)  
  73. $PidTagNormalizedSubject = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x0E1D,[Microsoft.Exchange.WebServices.Data.MapiPropertyType]::String);   
  74. $PidTagWlinkType = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x6849, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Integer)  
  75. $PidTagWlinkFlags = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x684A, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Integer)  
  76. $PidTagWlinkOrdinal = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x684B, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Binary)  
  77. $PidTagWlinkFolderType = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x684F, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Binary)  
  78. $PidTagWlinkSection = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x6852, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Integer)  
  79. $PidTagWlinkGroupHeaderID = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x6842, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Binary)  
  80. $PidTagWlinkSaveStamp = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x6847, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Integer)  
  81. $PidTagWlinkGroupName = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x6851, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::String)  
  82. $PidTagWlinkStoreEntryId = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x684E, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Binary)  
  83. $PidTagWlinkGroupClsid = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x6850, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Binary)  
  84. $PidTagWlinkEntryId = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x684C, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Binary)  
  85. $PidTagWlinkRecordKey = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x684D, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Binary)  
  86. $PidTagWlinkCalendarColor = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x6853, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Integer)  
  87. $PidTagWlinkAddressBookEID = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x6854,[Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Binary)  
  88. $PidTagWlinkROGroupType = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x6892,[Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Integer)  
  89. $PidTagWlinkAddressBookStoreEID = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x6891,[Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Binary)  
  90.   
  91.   
  92. $SharedFolders = @{}    
  93.     
  94. #$service.ImpersonatedUserId = new-object Microsoft.Exchange.WebServices.Data.ImpersonatedUserId([Microsoft.Exchange.WebServices.Data.ConnectingIdType]::SmtpAddress, $MailboxName)   
  95. Write-Host ("Getting CommonVeiwFolder")  
  96. #Get CommonViewFolder  
  97. $folderid = new-object Microsoft.Exchange.WebServices.Data.FolderId([Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::Root,$MailboxName)     
  98. $tfTargetFolder = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($service,$folderid)    
  99. $fvFolderView = new-object Microsoft.Exchange.WebServices.Data.FolderView(1)   
  100. $SfSearchFilter = new-object Microsoft.Exchange.WebServices.Data.SearchFilter+IsEqualTo([Microsoft.Exchange.WebServices.Data.FolderSchema]::DisplayName,"Common Views")   
  101. $findFolderResults = $service.FindFolders($tfTargetFolder.Id,$SfSearchFilter,$fvFolderView)   
  102. if ($findFolderResults.TotalCount -gt 0){   
  103.     $ExistingShortCut = $false  
  104.     $cvCommonViewsFolder = $findFolderResults.Folders[0]  
  105.     #Define ItemView to retrive just 1000 Items      
  106.     #Find Items that are unread  
  107.     $psPropset= new-object Microsoft.Exchange.WebServices.Data.PropertySet([Microsoft.Exchange.WebServices.Data.BasePropertySet]::FirstClassProperties)    
  108.     $psPropset.add($PidTagWlinkStoreEntryId)  
  109.     $psPropset.add($PidTagWlinkFolderType)  
  110.     $cntSearch = New-Object Microsoft.Exchange.WebServices.Data.SearchFilter+IsEqualTo($PidTagWlinkGroupName"Shared Contacts");  
  111.     $ivItemView =  New-Object Microsoft.Exchange.WebServices.Data.ItemView(1000)     
  112.     $ivItemView.Traversal = [Microsoft.Exchange.WebServices.Data.ItemTraversal]::Associated  
  113.     $ivItemView.PropertySet = $psPropset  
  114.     $fiItems = $service.FindItems($cvCommonViewsFolder.Id,$cntSearch,$ivItemView)      
  115.     foreach($Item in $fiItems.Items){  
  116.         $idVal = $null  
  117.         if($Item.TryGetProperty($PidTagWlinkStoreEntryId,[ref]$idVal)){  
  118.             Write-Host("Processing " + $Item.Subject)  
  119.                 $ssStoreID = $idVal;  
  120.                 $leLegDnStart = 0;  
  121.                 $lnLegDN = "";  
  122.                 for ($ssArraynum=($ssStoreID.Length - 2);$ssArraynum -ne 0; $ssArraynum--)  
  123.                         {  
  124.                             if ($ssStoreID[$ssArraynum] -eq 0)  
  125.                             {  
  126.                                 $leLegDnStart = $ssArraynum;  
  127.                                 $lnLegDN = [System.Text.ASCIIEncoding]::ASCII.GetString($ssStoreID$leLegDnStart + 1, ($ssStoreID.Length - ($leLegDnStart + 2)));  
  128.                                 $ssArraynum = 1;  
  129.                             }  
  130.                         }  
  131.                         Write-Host($lnLegDN)  
  132.                         $ncCol = $service.ResolveName($lnLegDN, [Microsoft.Exchange.WebServices.Data.ResolveNameSearchLocation]::DirectoryOnly, $true);  
  133.                         if ($ncCol.Count -gt 0)  
  134.                         {  
  135.                             try  
  136.                             {  
  137.                                 $SharedContactsId = new-object Microsoft.Exchange.WebServices.Data.FolderId([Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::Contacts, $ncCol[0].Mailbox.Address);  
  138.                                 $SharedContactFolder = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($service$SharedContactsId);  
  139.                                 $SharedFolders.Add($ncCol[0].Mailbox.Address, $SharedContactFolder);  
  140.                             }  
  141.                             catch  {  
  142.                                 Write-Host "Error getting Shared Folder"  
  143.                             }  
  144.                         }  
  145.               
  146.         }                               
  147.     }  
  148. }  
  149. if($SharedFolders.Keys.Count -ne 0){  
  150.     foreach($mbFolder in $SharedFolders.Keys){  
  151.         #Define ItemView to retrive just 1000 Items      
  152.         $ivItemView =  New-Object Microsoft.Exchange.WebServices.Data.ItemView(1000)      
  153.         $fiItems = $null      
  154.         do{      
  155.             $fiItems = $service.FindItems($SharedFolders[$mbFolder].Id,$ivItemView)      
  156.             #[Void]$service.LoadPropertiesForItems($fiItems,$psPropset)    
  157.             foreach($Item in $fiItems.Items){        
  158.                 Write-Host ("Mailbox : " + $mbFolder)  
  159.                 Write-Host ("Contact : " + $Item.Subject + " : " + $Item.EmailAddresses[[Microsoft.Exchange.WebServices.Data.EmailAddressKey]::EmailAddress1])  
  160.             }      
  161.             $ivItemView.Offset += $fiItems.Items.Count      
  162.         }while($fiItems.MoreAvailable -eq $true)   
  163.     }  
  164. }  


Monday, January 13, 2014

Paging eDiscovery results with the EWS Managed API in Exchange 2013

eDiscovery is one of the new features in Exchange 2013 aimed at both improving the search experience and also helping deal with Big Data in a mailbox or mailboxes (which is kind of like the Sun in that its just keeps getting bigger and will one day consume us all).

With eDiscovery in EWS you can perform two types of searches a

  • Estimate Query - Which will return information about the number of hits for a particular KQL query.
  • Preview Query - Will return your query hits as PreviewItems which you can then use to show more information about each hit.

If your doing a Preview Query with a very generic search predicate that is going to be returning many preview Items and because of the size of these results they will returned as separate paged results sets. This will mean you will need to make multiple search requests to navigate thought the result set pages.

To tell the server you want the next Page in the Results set you need to use the PageItemReference  . The PageItemReference value needs to be set to the SortValue of the Last Preview-item returned by the previous page.

I've put together a couple of Managed API samples for this one is a C# example and the other is a Template Powershell script you can use to do a eDiscovery on one mailbox. These sample pages items back in lots of 100, you can adjust this value but I wouldn't go much over 1000.  I've put a download of the code here, the script looks like.

  1. ## Get the Mailbox to Access from the 1st commandline argument  
  2.   
  3. $MailboxName = $args[0]  
  4. $KQL = "Subject:test";  
  5. $SearchableMailboxString = $MailboxName;  
  6.   
  7. ## Load Managed API dll    
  8. Add-Type -Path "C:\Program Files\Microsoft\Exchange\Web Services\2.0\Microsoft.Exchange.WebServices.dll"    
  9.     
  10. ## Set Exchange Version    
  11. $ExchangeVersion = [Microsoft.Exchange.WebServices.Data.ExchangeVersion]::Exchange2013    
  12.     
  13. ## Create Exchange Service Object    
  14. $service = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService($ExchangeVersion)    
  15.     
  16. ## Set Credentials to use two options are availible Option1 to use explict credentials or Option 2 use the Default (logged On) credentials    
  17.     
  18. #Credentials Option 1 using UPN for the windows Account    
  19. $psCred = Get-Credential    
  20. $creds = New-Object System.Net.NetworkCredential($psCred.UserName.ToString(),$psCred.GetNetworkCredential().password.ToString())    
  21. $service.Credentials = $creds        
  22.     
  23. #Credentials Option 2    
  24. #service.UseDefaultCredentials = $true    
  25.     
  26. ## Choose to ignore any SSL Warning issues caused by Self Signed Certificates    
  27.     
  28. ## Code From http://poshcode.org/624  
  29. ## Create a compilation environment  
  30. $Provider=New-Object Microsoft.CSharp.CSharpCodeProvider  
  31. $Compiler=$Provider.CreateCompiler()  
  32. $Params=New-Object System.CodeDom.Compiler.CompilerParameters  
  33. $Params.GenerateExecutable=$False  
  34. $Params.GenerateInMemory=$True  
  35. $Params.IncludeDebugInformation=$False  
  36. $Params.ReferencedAssemblies.Add("System.DLL") | Out-Null  
  37.   
  38. $TASource=@' 
  39.   namespace Local.ToolkitExtensions.Net.CertificatePolicy{ 
  40.     public class TrustAll : System.Net.ICertificatePolicy { 
  41.       public TrustAll() {  
  42.       } 
  43.       public bool CheckValidationResult(System.Net.ServicePoint sp, 
  44.         System.Security.Cryptography.X509Certificates.X509Certificate cert,  
  45.         System.Net.WebRequest req, int problem) { 
  46.         return true; 
  47.       } 
  48.     } 
  49.   } 
  50. '@   
  51. $TAResults=$Provider.CompileAssemblyFromSource($Params,$TASource)  
  52. $TAAssembly=$TAResults.CompiledAssembly  
  53.   
  54. ## We now create an instance of the TrustAll and attach it to the ServicePointManager  
  55. $TrustAll=$TAAssembly.CreateInstance("Local.ToolkitExtensions.Net.CertificatePolicy.TrustAll")  
  56. [System.Net.ServicePointManager]::CertificatePolicy=$TrustAll  
  57.   
  58. ## end code from http://poshcode.org/624  
  59.     
  60. ## 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    
  61.     
  62. #CAS URL Option 1 Autodiscover    
  63. $service.AutodiscoverUrl($MailboxName,{$true})    
  64. "Using CAS Server : " + $Service.url     
  65.      
  66. #CAS URL Option 2 Hardcoded    
  67.     
  68. #$uri=[system.URI] "https://casservername/ews/exchange.asmx"    
  69. #$service.Url = $uri      
  70.     
  71. ## Optional section for Exchange Impersonation    
  72.     
  73. #$service.ImpersonatedUserId = new-object Microsoft.Exchange.WebServices.Data.ImpersonatedUserId([Microsoft.Exchange.WebServices.Data.ConnectingIdType]::SmtpAddress, $MailboxName)   
  74.   
  75.   
  76. $gsMBResponse = $service.GetSearchableMailboxes($SearchableMailboxString$false);  
  77. $gsMBResponse  
  78. $msbScope = New-Object  Microsoft.Exchange.WebServices.Data.MailboxSearchScope[] $gsMBResponse.SearchableMailboxes.Length  
  79. $mbCount = 0;  
  80. foreach ($sbMailbox in $gsMBResponse.SearchableMailboxes)  
  81. {  
  82.     $msbScope[$mbCount] = New-Object Microsoft.Exchange.WebServices.Data.MailboxSearchScope($sbMailbox.ReferenceId, [Microsoft.Exchange.WebServices.Data.MailboxSearchLocation]::All);  
  83.     $mbCount++;  
  84. }  
  85. $smSearchMailbox = New-Object Microsoft.Exchange.WebServices.Data.SearchMailboxesParameters  
  86. $mbq =  New-Object Microsoft.Exchange.WebServices.Data.MailboxQuery($KQL$msbScope);  
  87. $mbqa = New-Object Microsoft.Exchange.WebServices.Data.MailboxQuery[] 1  
  88. $mbqa[0] = $mbq  
  89. $smSearchMailbox.SearchQueries = $mbqa;  
  90. $smSearchMailbox.PageSize = 100;  
  91. $smSearchMailbox.PageDirection = [Microsoft.Exchange.WebServices.Data.SearchPageDirection]::Next;  
  92. $smSearchMailbox.PerformDeduplication = $false;             
  93. $smSearchMailbox.ResultType = [Microsoft.Exchange.WebServices.Data.SearchResultType]::PreviewOnly;  
  94. $srCol = $service.SearchMailboxes($smSearchMailbox);  
  95.   
  96. if ($srCol[0].Result -eq [Microsoft.Exchange.WebServices.Data.ServiceResult]::Success)  
  97. {  
  98.     if ($srCol[0].SearchResult.ItemCount -gt 0)  
  99.     {                    
  100.         do  
  101.         {  
  102.             $smSearchMailbox.PageItemReference = $srCol[0].SearchResult.PreviewItems[$srCol[0].SearchResult.PreviewItems.Length - 1].SortValue;  
  103.             foreach ($PvItem in $srCol[0].SearchResult.PreviewItems) {  
  104.                 Write-Host ($PvItem.Subject);  
  105.             }                          
  106.             $srCol = $service.SearchMailboxes($smSearchMailbox);  
  107.             Write-Host("Items Remaining : " + $srCol[0].SearchResult.ItemCount);  
  108.         } while ($srCol[0].SearchResult.ItemCount-gt 0 );  
  109.           
  110.     }  
  111.       
  112. }  


Wednesday, January 01, 2014

Create a Public Folder (or Mailbox folder) Post using EWS and Powershell

Somebody asked a couple of weeks ago about creating Post Items using EWS and Powershell which I haven't posted a sample for previously. Given its the first day of the year an example of a post about how to create a post to wish everybody happy new year seems like good idea.

Creating a POST item using the EWS Managed API is pretty straight forward as their is a PostItem Class you can use. To create a post is a folder you just need to know the ewsID of the folder you want to create the POST in. So in EWS you need some code that will either search and find the Folder in the Mailbox you want to post to or the Public Folder you want to post to.  I've created two sample one show how to create a post in Mailbox folders and the other in a Public folder. I've posted a download of the two sample here . The code for creating a POST in a Public folder 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. function FolderIdFromPath{  
  74.     param (  
  75.             $FolderPath = "$( throw 'Folder Path is a mandatory Parameter' )"  
  76.           )  
  77.     process{  
  78.         ## Find and Bind to Folder based on Path    
  79.         #Define the path to search should be seperated with \    
  80.         #Bind to the MSGFolder Root    
  81.         $folderid = new-object Microsoft.Exchange.WebServices.Data.FolderId([Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::PublicFoldersRoot)     
  82.         $tfTargetFolder = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($service,$folderid)    
  83.         #Split the Search path into an array    
  84.         $fldArray = $FolderPath.Split("\")  
  85.          #Loop through the Split Array and do a Search for each level of folder  
  86.         for ($lint = 1; $lint -lt $fldArray.Length; $lint++) {  
  87.             #Perform search based on the displayname of each folder level  
  88.             $fvFolderView = new-object Microsoft.Exchange.WebServices.Data.FolderView(1)  
  89.             $SfSearchFilter = new-object Microsoft.Exchange.WebServices.Data.SearchFilter+IsEqualTo([Microsoft.Exchange.WebServices.Data.FolderSchema]::DisplayName,$fldArray[$lint])  
  90.             $findFolderResults = $service.FindFolders($tfTargetFolder.Id,$SfSearchFilter,$fvFolderView)  
  91.             if ($findFolderResults.TotalCount -gt 0){  
  92.                 foreach($folder in $findFolderResults.Folders){  
  93.                     $tfTargetFolder = $folder                 
  94.                 }  
  95.             }  
  96.             else{  
  97.                 "Error Folder Not Found"   
  98.                 $tfTargetFolder = $null   
  99.                 break   
  100.             }      
  101.         }   
  102.         if($tfTargetFolder -ne $null){ 
  103.             return $tfTargetFolder.Id.UniqueId.ToString() 
  104.         } 
  105.     } 
  106. } 
  107. #Example use 
  108. $fldId = FolderIdFromPath -FolderPath "\aaaa\bbbb" 
  109. if($fldId -ne "Error Folder Not Found"){ 
  110.     $SubFolderId =  new-object Microsoft.Exchange.WebServices.Data.FolderId($fldId) 
  111.     $SubFolder = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($service,$SubFolderId) 
  112.  
  113.     $NewPost = New-Object Microsoft.Exchange.WebServices.Data.PostItem -ArgumentList $service   
  114.     $NewPost.Subject = "Happy New Year"   
  115.     $NewPost.Body = New-Object Microsoft.Exchange.WebServices.Data.MessageBody   
  116.     $NewPost.Body.BodyType = [Microsoft.Exchange.WebServices.Data.BodyType]::HTML   
  117.     $NewPost.Body.Text = "Happy New Year" 
  118.     $NewPost.Save($SubFolder.Id)   
  119.     Write-Host ("Created Post")  
  120. }