My company does not have a Policy in effect to prevent the use of PST files
or the AutoArchive function, however I have a user whose Outlook does not
contain the option for Auto Archive.

I have added the D_Word DisabelPST to his registry
(LocalMachine-office-12-outlook) with a value of 0, and I can create PST
files. However, I cannot get the AutoArchive option to appear in the
tools-options menu.

Is there another registry entry I'm missing?