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Howto Delete Attachments with WebDAV

The DELETE verb only works on Exchange 2003 SP1 - it will not work on any earlier version/service pack. CDOEX, CDO 1.21, Extended MAPI, etc can do this on Exchange 2000 or 2003. One possible work-around is to read the message stream using a WebDAV GET,

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

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
 
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