The SOapAction header filed is missing in CMIS SOAP Request Soap 1.1 requires the SOAPAction Header see: http://www.w3.org/TR/2000/NOTE-SOAP-20000508/#_Toc478383528 The fix is simple. Just add SOAPAction: "" to the header fields
sorry. i mean *header field*
A libcmis problem rather than LibreOffice one: https://sourceforge.net/p/libcmis/tickets/7/