I have an Active Directory user account in a Windows 2003 domain that does not seem to keep the entries specified in the 'Security' tab for the account. After about 15-30 minutes the security list keeps reverting back to an old list of entries. I have even selected the 'Default' button to 'Replace all permissions entries with default settings' but it still reverts back to an old list after a period of time. Any idea what's going on? Thanks.