I have SharePoint 2010 installed on a Windows 2008R2 machine using claims-based authentication. Most of my clients are Windows 7 machines, but we still have a few stragglers using Windows XP. The SharePoint farm is setup with mixed-mode authentication, AD (Kerberos) and FBA.
When I have it setup like this, all Windows XP users have difficulty with things like Word/Excel and (more specifically) with 'Open with Explorer'. When they click on that, they get repeated login windows (despite entering the correct password). If they cancel the login window, they get Web Folders (FPRPC, not WebDAV). If I change nothing else except remove FBA (so now it's Claims with AD only), the users can access Explorer View (WebDAV) correctly and all other login-prompt issues go away
Windows 7 users don't have any problems with either method. Is this setup supported?