Office 2013 displays a LOT of credential prompts with Smoothwall on NTLM
Our Smoothwall is configured for NTLM authentication, and this generally works fine for us. However, with Office 2013, I'm seeing a LOT of requests for proxy auth credentials:
The hostname varies, and the request will appear just by opening documents, or even just by opening Excel with a blank document. I've already added the following to our noauth lists, which has eliminated most of the auth requests:
However, I've just found that clicking any URL in a document, or in OneNote, will prompt for credentials (unless the site is on the noauth list). In this case, the hostname listed after "Connecting to proxy server" is always the host specified in the URL.
If I supply valid credentials, Office just asks for them again, as if they are invalid. However, if I click cancel, the URL then passes to IE and opens fine.
I know Office 2010 was picky with NTLM auth (YouTube embedding never worked for us, for example), but it never prompted just for clicking on a link before. Office 2013 does, and I can't deploy it like this.