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I was able to integrate with Sharepoint 2013 CMIS producer only by using Basic HTTP Authentication!
According to Microsoft all other authentication methods are available, but so far I wasn't able to connect using NTLM or any other.

BTW using SoapUI and running against SOAP service:


Testing soap service:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns="http://docs.oasis-open.org/ns/cmis/messaging/200908/">

At the same time Sharepoint native web service for the same web application and site:
runs with NTLM authentication just fine.

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A customer reported the exact same problem, adding details here for info/searchability: Server is SharePoint 2010 with NTLM authentication, client is CMIS Workbench, configured with Authentication: NTLM and URL https://server/_vti_bin/ListData.svc, result in CMIS Workbench: invalid argument: Bad request. Could anyone please contact Microsoft so that they fix their product? –  Nicolas Raoul Jan 8 '14 at 11:13
@NicolasRaoul Unfortunately we don't have the option to contact Microsoft regarding their product. That is what every customer needs to do by themselves. –  Benny Skogberg Jul 15 '14 at 8:40

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