Any ideas? I'm running Server 14 (updates installed) on windows 2008R2.
I don't know if this is helpful.. But when I was setting up my files for authentication. I had two AD groups for authentication Admins (which had full access) and staff (data entry access). I had two AD groups setup on our 2008R2 Server. FMP.Admins and FMP.Staff
I have both an AD adm account and my regular account. When I logged into the FMP file I was always getting the admin access, though I didn't want that. I wanted all the data entry access first. So in FMP in the file where you setup your access groups, it does matter the order in the Security/Accounts. FMP authenticates users top down. so maybe your groups are in the wrong order there for authentication.