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. The screenshot below shows the application in action...

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 respond to the notifications. The listener form...

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 required updating many mailboxes (in this case resource...

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 object in other places. What this means is 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 (hosted on a standalone application server) needs...

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. A lot of customers do not want to use...

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 on how to change this status to Busy, or OOF. If...

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 Exchange (i.e. when you call Update()). There are...

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 item type of a folder is stored in a single MAPI...

A recent case brought up the question of whether it is possible to import calendar items into a mailbox from a text file using PowerShell. While there aren't any cmdlets built-in that support this, it is certainly possible to implement this using PowerShell and the EWS Managed API. Sample script is attached...

Exchange 2010 OWA Folder View Settings are stored in a MAPI property and are customizable per folder. Conversation View is enabled by default in OWA 2010 and even if you disable it on the existing folders, new folders you create will always have Conversation View enabled. The property that stores...

With Exchange 2010, CDO and all the other APIs that were commonly used from VBScript (e.g. WebDAV) are no longer supported. The only scriptable API is EWS. While it is relatively easy to use EWS using the managed API, this is not possible from VBScript. However, programming with EWS from VBScript can...

I have now published SOAPe, the SOAP (EWS) test application that I previously blogged about up to Codeplex. Documentation and updates will follow in due course. http://soape.codeplex.com/ I have also written a WebDAV test application that works in a very similar way, but supports WebDAV verbs...

We sometimes get cases where EWS is being used from a language we don't support (e.g. Java). In such cases, we can support the actual SOAP conversation (i.e. the raw requests/responses between the client and EWS). To do this, we need to have the actual SOAP requests, and more importantly an application...

The question came up recently whether one user account can be used to impersonate all mailboxes in an environment consisting of Exchange 2007 and 2010 servers. As most people realise, there have been huge changes to the permissions structure between the two versions (2010 introducing RBAC), so can we...