I have two users that have been archiving to reduce their Exchange enabled
mailbox size. One has a 555000 kb folder size and the other has a 1850000 kb
folder size. Both are losing emails from various folders in the archive. I
have checked the posts here, and they are using the new version of file
format, i.e. the Unicode version.

Per KB832925 I checked for the Registry Entries that govern MaxFileSize in
the noted reg path
HKEY_CURRENT_USER\Software\Policies\Microsoft\Offi ce\11.0\Outlook\PST but
after \policies\Microsoft the \Office\11.0\Outlook\PST path doesn't exist.

Any ideas about how to continue to troubleshoot this issue?

Many thanks,
Duncan Pope