For the PDF automailer functionality of the Aloaha PDF Suite and Aloaha Multisignator it was possible to use WebDAV in the past. Since WebDav became something of the past WebDAV has been replaced with Exchange Web Services (EWS).
To be able to use this functionality please note that you need to have .NET 3.5 installed. Furthermore your Exchange Server needs to be configured to accept requests via HTTPS.
The PDF Suite can be downloaded from http://www.aloaha.com/download/aloaha_pdf.zip
The Multisignator can be downloaded from http://www.aloaha.com/download/aloaha_multisignator.zip