COPY and MOVE will fail with a 502 error when trying to work across stores - not supported. You could read the MIME of messages with a GET and use PUT to write the contents to the new location - this will simulate a COPY. Custom properties and storage properties will likely not get copied. You can try...

There is no mechanism to add an attachment in WebDAV. You will need to create/recreate the item using a WebDAV PUT. The text you would be putting would be the mime of the item, which also contains the attachment. It’s useful here to use CDOSYS to create a message and add an attachment – then extract...

To send an email with WebDAV, you will you will need to create/recreate the item with a WEBDAV PUT using the MIME of the message. It gets tricky when working with attachments. To get around the complexity of sending an email with an attachment, you may want to look at using CDOSYS to build the message...

' This example shows how to do a PUT of a message to a folder. What is being written with a PUT would ' be the MIME of a message and such MIME can also contain the MIME of the message. PUT works against ' messaging items directly such as mail messages. It cannot be used to add an attachment without ...

Welcome to WebDAV 101. Here you will find information on WebDAV and other Messaging APIS which you might not find elsewhere. WebDAV 101 Training/White Paper: Attached is a document which provides a good introduction to WebDav for Exchange. It's bascily a white paper or training paper on WebDAV...