This is much a feature request as a bug report - I am trying to create SharePoint tasks and am finding the authentication options too limiting - NTLM is how I authenticate to SharePoint but it is not an authentication type choice. There is only basic, anonymous or form. So I cannot get this to work.

Is there a workaround?

IMO the SharePoint tasks should be structured like the HTTP task. Two changes I would like to see:

1) Choose the credentials from the standard credentials instead of manually enter them as a distinct entity
2) Provide the same authentication types as the http task: Add NTLM, Kerberos, Digest and Negotiate.

Default option is Windows (NTLM) authentication.

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Default option is Windows (NTLM) authentication.

Hmm, well I get a 401 back and I have triple-checked the credentials.

This is in the security log:

Failure Information:
Failure Reason: Unknown user name or bad password.
Status: 0xc000006d
Sub Status: 0xc0000064

Any thoughts?

Are you using an AD user or local user?

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Active Directory

Active Directory

Can you try with a local admin as well?

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Same result.

For what its worth - the substatus code (0xc0000064) means user does not exist - which it most certainly does.

Really hard to say what the problem is. But maybe the domain name has been specified wrong. Also, please double check what kind of auth is set on the IIS server for this particular folder.

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What is the preferred way to specify the domain?

domain\username or username@domain?

ASP.Net impersonation and Windows Authentication are enabled on the site.