Ok the test build for the version of BOINC that should support NTLM authentication has been released.

http://boinc.berkeley.edu/dl/boinc_5.10.40_windows_intelx86.exe

This is a test build so keep that in mind.

This version is set to automatically work with NTLM proxies (if it is your http proxy). However, our testing didn't show that always working. If you find that it doesn't work automatically, then please create a file called cc_config.xml in your BOINC installation folder that contains the following:

<cc_config>
<log_flags>
<file_xfer_debug>1</file_xfer_debug>
<http_debug>1</http_debug>
<http_xfer_debug>1</http_xfer_debug>
<proxy_debug>1</proxy_debug>
</log_flags>
<options>
<force_ntlm>1</force_ntlm>
</options>
</cc_config>

This will force the underlying libCurl package to assume NTLM auth will be used. Our testing showed that this did work correctly.

Please let us know how the testing goes.