I just started working as admin in a Windows 7 / Windows Server 2008 R2 environment. Lately I encountered a strange behaviour of the profile service on some user notebooks: in the list of user profiles, all accounts are displayed as "unknown account", except the one I logged in with and the standard account. However, there are multiple folders in the C:\Users directory belonging to profiles that exist in the Active Directory domain, and at least one is regularly being used on the machine. Without problems, as far as I know.
Any explanations for this behaviour? It keeps me from properly deleting profiles on the machine, as I don't know which "unknown account" is which.