Skip to main content

Sending a message with a classification in EWS in C# and Powershell

Message classifications have been around since Exchange 2007 and are a feature of Exchange that allows you to setup your email system to add classification to messages to comply with e-mail policies and regulatory responsibilities that Governments and other bodies may require of an organization. If you want to set a message classification on a Message your sending pro-grammatically via EWS you need to first find out what the GUID of the classification you want to set is. There are a few ways of doing this the easiest is using the Get-MessageClassification cmdlet http://technet.microsoft.com/en-us/library/aa996911.aspx the value you will need for your app or script is the ClassificationID which represents the PidLidClassificationGuid Mapi property which if you’re playing around with Transport Agents this gets converted into the x-ms-exchange-organization-classification x-header. You can also grab it out of your classification xml file if you have deployed it to Outlook.

All the properties that relate to classification are documented in http://msdn.microsoft.com/en-us/library/ee217686%28v=EXCHG.80%29.aspx. At the most basic level if you want to set a classification on a message your sending you need to set the following two properties on that message.

PidLidClassificationGuid which you set to the GUID of the classification you want applied to the message

PidLidClassified which is a Boolean that tells the Exchange this message is classified.

With the EWS Managed API in C# this look like

EmailMessage emEmailMessage = new EmailMessage(service);
emEmailMessage.ToRecipients.Add("user@domaim.com");
emEmailMessage.Subject = "test Classify";
emEmailMessage.Body = new MessageBody("test");
ExtendedPropertyDefinition PidLidClassificationGuid = new ExtendedPropertyDefinition(DefaultExtendedPropertySet.Common, 34232, MapiPropertyType.String);
emEmailMessage.SetExtendedProperty(PidLidClassificationGuid, "e67e794b-f6d1-4c8f-9f63-1118d21dafa6");
ExtendedPropertyDefinition PidLidClassified = new ExtendedPropertyDefinition(DefaultExtendedPropertySet.Common,34229, MapiPropertyType.Boolean);
emEmailMessage.SetExtendedProperty(PidLidClassified, true);
emEmailMessage.SendAndSaveCopy();

In Powershell it looks like

$MailboxName = "user@domain.com"
$dllpath = "C:\Program Files\Microsoft\Exchange\Web Services\1.1\Microsoft.Exchange.WebServices.dll"
[void][Reflection.Assembly]::LoadFile($dllpath)
$service = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService([Microsoft.Exchange.WebServices.Data.ExchangeVersion]::Exchange2010)
#$service.Credentials = New-Object System.Net.NetworkCredential("glen@domain.com","password")
$service.AutodiscoverUrl($MailboxName,{$true})
$message = New-Object Microsoft.Exchange.WebServices.Data.EmailMessage($service)
$message.Subject = "Test"
$message.Body = "Test 123"
$message.ToRecipients.Add("user@domain.com")
$PidLidClassificationGuid = New-Object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition([Microsoft.Exchange.WebServices.Data.DefaultExtendedPropertySet]::Common, 34232,[Microsoft.Exchange.WebServices.Data.MapiPropertyType]::String);
$message.SetExtendedProperty($PidLidClassificationGuid, "e67e794b-f6d1-4c8f-9f63-1118d21dafa6");
$PidLidClassified = New-Object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition([Microsoft.Exchange.WebServices.Data.DefaultExtendedPropertySet]::Common,34229,[Microsoft.Exchange.WebServices.Data.MapiPropertyType]::Boolean);
$message.SetExtendedProperty($PidLidClassified, $true);
$message.Send.Invoke()

Labels

Labels:

Popular posts from this blog

The MailboxConcurrency limit and using Batching in the Microsoft Graph API

If your getting an error such as Application is over its MailboxConcurrency limit while using the Microsoft Graph API this post may help you understand why. Background   The Mailbox  concurrency limit when your using the Graph API is 4 as per https://docs.microsoft.com/en-us/graph/throttling#outlook-service-limits . This is evaluated for each app ID and mailbox combination so this means you can have different apps running under the same credentials and the poor behavior of one won't cause the other to be throttled. If you compared that to EWS you could have up to 27 concurrent connections but they are shared across all apps on a first come first served basis. Batching Batching in the Graph API is a way of combining multiple requests into a single HTTP request. Batching in the Exchange Mail API's EWS and MAPI has been around for a long time and its common, for email Apps to process large numbers of smaller items for a variety of reasons.  Batching in the Gr...
Read more

Exporting and Uploading Mailbox Items using Exchange Web Services using the new ExportItems and UploadItems operations in Exchange 2010 SP1

Two new EWS Operations ExportItems and UploadItems where introduced in Exchange 2010 SP1 that allowed you to do a number of useful things that where previously not possible using Exchange Web Services. Any object that Exchange stores is basically a collection of properties for example a message object is a collection of Message properties, Recipient properties and Attachment properties with a few meta properties that describe the underlying storage thrown in. Normally when using EWS you can access these properties in a number of a ways eg one example is using the strongly type objects such as emailmessage that presents the underlying properties in an intuitive way that's easy to use. Another way is using Extended Properties to access the underlying properties directly. However previously in EWS there was no method to access every property of a message hence there is no way to export or import an item and maintain full fidelity of every property on that item (you could export the...
Read more

Sending a Message in Exchange Online via REST from an Arduino MKR1000

This is part 2 of my MKR1000 article, in this previous post  I looked at sending a Message via EWS using Basic Authentication.  In this Post I'll look at using the new Outlook REST API  which requires using OAuth authentication to get an Access Token. The prerequisites for this sketch are the same as in the other post with the addition of the ArduinoJson library  https://github.com/bblanchon/ArduinoJson  which is used to parse the Authentication Results to extract the Access Token. Also the SSL certificates for the login.windows.net  and outlook.office365.com need to be uploaded to the devices using the wifi101 Firmware updater. To use Token Authentication you need to register an Application in Azure https://msdn.microsoft.com/en-us/office/office365/howto/add-common-consent-manually  with the Mail.Send permission. The application should be a Native Client app that use the Out of Band Callback urn:ietf:wg:oauth:2.0:oob. You ...
Read more
All sample scripts and source code is provided by for illustrative purposes only. All examples are untested in different environments and therefore, I cannot guarantee or imply reliability, serviceability, or function of these programs.

All code contained herein is provided to you "AS IS" without any warranties of any kind. The implied warranties of non-infringement, merchantability and fitness for a particular purpose are expressly disclaimed.