Getting a 401 with EWS? Read this before opening a support case!

If your getting a 401 with an API going against Exchange or basically anything then the issue is most likely with your credentials and NOT your code. Instead of jumping to the step of opening a support case do the following: Recheck your login information. Check the user id used, password and domain information. Logins…

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Updating Visual Studio generated proxy classes for EWS development.

Something I would like to highlight are issues with generated proxy classes for EWS development. We support Visual Studio generated proxy classes for EWS development – no other proxy generated classes are supported for EWS development.  I’m going to provide some basic information so that you have a starting point for cases involving EWS proxy…

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About: Exchange service XSD and WSDL

Some developers use tools which work against XSD and WSDL.  Below is some information on the subject. Note that support is provided for proxy class generation only with Visual Studio – this means third party generators are not supported. The XSD is updated per EWS version: EWS schema versions in Exchange https://msdn.microsoft.com/en-us/library/office/dn741586(v=exchg.150).aspx It’s best to…

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When a certain time zone does not work with the EWS Managed API…

When using EWS with some time zones you might run into issues with getting to work.  As an example, you might run into issues with Russian Standard Time or calling GetUserAvailabilty.  You might even see the “The specified time zone isn’t valid” error. There are usually work-arounds for such issues. The need to keep Windows…

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Subscriptions with EWS and EAS don’t get notifications when read status is changed.

This is known behavior. If another activity happens which triggers a notification, then you would likely get a notification for the update on the read status change at that time.  Read receipt is the only ping that tells you ‘message has been read’.   Read state changes are pushed with sync, but don’t trigger a sync …

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EASTester 1.10 Release

This release has some new features and several important fixes. The goals of this release were to fix existing bugs and to add some features to make its usage easier. Now there is some basic help available for working with EAS. The help provides information on EASTester, EAS response codes, IIS response codes and a…

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EWS and Federated Authentication

Many are joining enjoying the benefits of federated authentication with OWA. However, with EWS they find that they cannot use federated authentication. EWS can use Basic, NTLM and oAuth for authentication.  EWS does not support things like SAML tokens, etc.  There is also no developer support for changing authentication token credentials programmatically – such as…

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Best Practices: EWS Managed API coding for Exchange

There are issues which we seem to get a lot of cases on which are tied to the way a customer writes their code.  Often there are sections of code which were missing or that they otherwise should have implemented.  If your running into an issue or writing new code, then please read all points…

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EWSEditor 1.14 Released

It’s been a long time since there has been a release of EWSEditor. This latest version has many new features and fixes.  There are a few things I would like to highlight.: This version uses a recent build of the EWS Managed API based-upon the open source published code. There is a degree of implementation of oAuth. …

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About: Exchange Web Services (EWS) – Getting started with EWS

API Type:  Mailbox Assessor API Interface: APIs which can send a POST.  Business Logic: Works with  mailbox and public folder content including items, folders and special settings. Development Languages: Anything which can send a post. So, you can write code for iOS, Droid, Windows forms, ASP.NET, JavaScript, PowerShell…  Property Access: Yes Product Versions: Exchange 2007,…

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