So, like many other folks out there I’ve been playing with the new SharePoint Designer 2010 public beta, and  also like many of you, I’ve been liking a lot of what I’m seeing. Still, I keep running across issues that I really hope get fixed before the release. This one has been plaguing the product since the early betas and I really hope it gets addressed before final release. As of now, SharePoint Designer cannot connect to a SharePoint site if you have any additional host headers attached to the site. For many organizations I would say this is a big limitation. As an example, say you have created your portal application at the following address, portal.acmeman.net. Now, for the sake of your internal users you decide to add the header of simply portal, so that your users don’t have to enter the entire FQDN when accessing the site. Your IIS would look something like this,

Unfortunately, now when you try and open the site from Designer you’ll get the following error,

Clicking OK will then present you with this,

The fix is to simply remove the offending additional header and the site will once again become accessible. Again, I will point out that this is still a Beta product and I have every confidence that Microsoft will have this working by release. None the less, I wanted to put this out there and raise some awareness of the issue amongst the Designer community.