Trying to have 2012 CA publish to a Network share gives 0x8007010b (win32/HTTP: 267)

I'm trying to have a Server 2012 CA publish the CRL to a network share via Powershell cmdlet Add-CACRLDistributionPoint .

For testing purposes the network share is writable by Domain Users (yes, Ill change that later :-)).  I've tried many different combinations to no avail.

Add-CACrlDistributionPoint -Uri http://technet.microsoft.com/library/hh831348.aspx .

Any ideas?

Somewhat Related question: can I use DFS pathnames instead of using the server name directly?  (that didn't work for me either :-))

Thank you in advance,