It turns out that there is a hidden system list on SharePoint Foundation (actually all versions of SharePoint, but much more useful in SharePoint Foundation). To view this list, you simply visit http://<YourSharePointSite>/_catalogs/users/simple.aspx or details.aspx.
After installing SharePoint 2010 SP1 with the June CU on a clients server. I ran the SharePoint 2010 Products Configuration Wizard like I always do and I got an error that said that it couldn’t connect to the database. The Actual message from the PSConfig log was:
I recently had a client with a unique situation regarding logging in to their Sharepoint environment. Without going into too much boring detail, the bottom line was the client needed to allow their Active Directory users to log in to a Sharepoint site that only used Forms-Based Authentication. (Sidenote: If you’re truly curious, the Sharepoint site itself wasn’t actively denying people using windows credentials. The problem was that the browser the client’s AD users were using to access this particular Sharepoint site didn’t play well with windows credentials).