Hello, the computer having the issue is an windows xp os. When writing a new email the user can add recipients from autocomplte. he types in B Brett ****** comes up. it does not work this way with the distribution list they are not being cached to the stream_autocomplete_...dat file. I ran the SCANPST.exe file and it only found inconsistencies no errors. please help I am extremely confused and running out of ideas. the list will save for the outlook session but disappear after outlook is closed and reopened.