Dan's WebDAV 101

This blog covers Messaging API development for Exchange and Outlook. My name is Daniel Bagley, I'm on the Messaging Developer Team.

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  • Blog Post: How to tell which authentication protocols can be used with WebDAV.

    When you do an anonymous POST to the “exchange” virtual folder, you will get back a response which will tell you about which authentication protocols are supported. Each “WWW-Authenticate:” header in the response tells you which type of authentication method is supported. If you...
  • Blog Post: WebDAV FBA Authentication Sample Explained.

    Here is some basic information on how FBA authentication is done with WebDAV. To provide some insight into how this works, you should look at the sample code of KB891748 and review it with the explanation below. Note that if you are going against Exchange 2007, you should reconsider using FBA authentication...
  • Blog Post: WebDAV and OWA Authentication Settings

    With any login issue, it’s important to know which authentication protocols are valid. You have to code to an authentication protocol which can be used. The authentication settings for OWA and WebDAV are tied together under Exchange 2000 and 2003. Because of this, developers run into issues with...
  • Blog Post: WebDAV: XML DOM vs managed classes.

    I've seen a lot of issues with using the MSXML DOM when trying to get credentials from the owaauth.dll for FBA authentication. The managed classes seem to work all the time and in all versions. However, the MSXML DOM wont always reuturn cookies and sometimes just plain fails in the calls. Each version...
  • Blog Post: System.Net.Mail with SSL to authenticate against port 465

    Sending mail using System.Net.Mail with SSL will fail: System.Net. NetworkCredential aCred = new System.Net. NetworkCredential ( "myacct" , "mypassword" ); SmtpClient smtp = new SmtpClient ( "smtp.mail.myserver.com" , 465); smtp.EnableSsl = true ; smtp.UseDefaultCredentials = false ; ...
  • Blog Post: Exchange Protocol Documentation

    Microsoft released preliminary protocol documentation for Exchange 2007 (as well as Microsoft Office 2007 and SharePoint Server) as part of Microsoft's Interoperability Principles. The Exchange protocols are now publicly available on the Open Protocol Specifications section of MSDN in preliminary form...
  • Blog Post: Exchange Protocol Documentation

    Microsoft released preliminary protocol documentation for Exchange 2007 (as well as Microsoft Office 2007 and SharePoint Server) as part of Microsoft's Interoperability Principles. The Exchange protocols are now publicly available on the Open Protocol Specifications section of MSDN in preliminary form...
  • Blog Post: How WebDAV - Use Basic Authentication with WebDAV even when FBA is enabled.

    Some customers (developers) wish to use Basic Authentication when Forms Based Authentication (FBA) is enabled for Outlook Web Access (OWA). If OWA's FBA is enabled, all WebDAV access needs to be FBA authenticated - which means significant changes need to be done to the code - not to mention the testing...
  • Blog Post: Using ISAPI Extensions to change-out OWA Credential is not supported

    Single sign-on applications usually use an ISAPI Extension on Exchange servers in order to swap-out credentials being passed to OWA. This type of manipulation is not supported by Microsoft. In fact any thing which augments the behavior in this way is not supported. While such filters/extensions may have...
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