To complete my unintentional series on EWS notifications, I have written a sample application showing how to deal with streaming subscriptions. The application includes full logging of both events and EWS calls, so is very useful for troubleshooting....

I wrote a sample application quite a while ago showing how to write a push notification client using WCF. This seemed a little complex to me, and I have now got another sample that uses the managed API and a custom listener (taken from SOAPTestApp ) to...

Outlook doesn't have any built in methods to find the owner of an item. The question was asked if it is possible to find this information when the user is looking at an item in a shared folder. For example, if a user has delegate permissions to a folder...

We had a request for such an application from one of our customers so I though I would share the code with the community. The application creates a new Inbox rule in the default message store. The rule will be triggered for all the incoming messages...

I wrote this MAPI application for a customer the other day. The application uses the Outlook 2010 MAPI headers and some of the header files shipped with MFCMAPI. They are all included in the attached archive. You can run the application to enable or...

Exchange 2010 has cmdlets ( Add-MailboxFolderPermission , Set-MailboxFolderPermission ) that allow an administrator to update folder permissions on a user's calendar. Unfortunately, Exchange 2007 does not have these cmdlets. We recently had a case that...

If you regularly send email internationally, you may notice an issue that crops up in email conversations between two locales where the "Re." prefix differs. Basically, each time the message is replied to, another Re. (or Aw., Antwort, etc.) is tagged...

Granting delegate access to a mailbox stores the permission on the mailbox to which the permission is granted. But what happens when a user is deleted? The simple answer is nothing - deleting a user (or other AD object) does not delete references to that...

To augment an earlier blog post that describes how to use EWS in a SharePoint webpart without needing ApplicationImpersonation, here I will go through the steps needed to do this from a standard web application. The scenario is that a web application...

We have been getting a few requests for code to automate the import of bank holidays in Outlook and prevent duplication. The easiest way to achieve this was to actually use the updated Outlook.hol file containing bank holiday definitions that Outlook...

We have been getting a few requests for changing the name of the root folder in Outlook 2010 following an SMTP address change, to reflect the new SMTP address of the users. For that I have written an Outlook add-in that performs an Active Directory...

We have recently had a case where the BeforeItemMove event wasn’t being triggered when switching between two calendar folders in Outlook 2007 or 2010.   To subscribe for the event we were using the Outlook.Explorer.CurrentFolder property to retrieve...

As described in a previous blog , there is unfortunately a known issue with drag/drop and Outlook 2010. The previous blog describes the issue and also demonstrates a workaround that can be used when needing to implement drag/drop in an Outlook add-in...

An Exchange Transport Agent allows you to either add new name properties, change the value or remove existing properties. If you choose to log data in a log file or write events to the event log, you should be aware of the fact that the Exchange Transport...

Note: You need to use the Outlook MAPI header files with this code.   The exe uses two switches –A for processing all the profiles and –N followed by a profile name for processing a specific profile.   1: // MAPISetCachedMode.cpp : Defines the...

Note: You need to use the Outlook MAPI header files with this code.   1: // MAPIDeleteHotmailAccount.cpp : Defines the entry point for the console application. 2: // 3:   4: #include "stdafx.h" 5: /...

Note: You need to use the Outlook MAPI header files with this code.   1: // MAPICreateBlankProfile.cpp : Defines the entry point for the console application. 2: // 3:   4: #include "stdafx.h" 5: #include...

We recently had a case where there were invalid delegates on a mailbox and these were causing further issues (which aren't important with regards to this blog!). Invalid delegates can come about when mailboxes and users are deleted from an organisation...

A question that I have seen crop up quite a bit on the internet is how to use EWS with a SharePoint webpart. Using EWS is quite easy, as you can simply reference the managed API and use that - but the main implementation headache is how to set up authentication...

While a lot of Office 365 administration can be done from the web interface, there are still a fair number of things that require PowerShell. One of these things is delegate management (though this is something that can also be handled via Outlook, but...

There is a sample on MSDN that shows how to write and install custom transport agent (it can be found here: http://msdn.microsoft.com/en-us/library/aa579185%28v=exchg.140%29.aspx ). The agent itself is very simple, but it has been pointed out that if...

As you may or may not know, Outlook has a facility to import known public holidays. However, currently while these holidays will be imported into the Outlook calendar, the status of these holidays is set to Free. An often received request is for advice...

The list below is provided for those who wish to become familiar with Microsoft PowerShell 2.0. These resources are all available online and free of charge. Top Level Site for PowerShell: http://www.microsoft.com/powershell Windows PowerShell Training...

An interesting case recently asked how to remove Email1, Email2, and/or Email3 from a contact using the EWS Managed API. If you try to set any of these properties to null, or an empty string, then you will receive an error when sending the request to...

It is possible to change the default item type of Outlook folders, and this is commonly done when custom forms are being used. The question came up recently asking whether it is possible to do this programmatically, and it certainly is. The default...