Outlook retains them forever. Check whether they have their Autoarchive set
to archive them. Tools | Options | Other Tab | Archive. That's where
you'll find their settings and be able to see the destination folder.
If they have been Archiving in 2003, the Archive.pst should be visible in
the Folder list within Outlook.
Judy Gleeson
MVP Outlook
Trainer and Consultant
read my articles here: www.judygleeson.com
Canberra, Australia
how to post questions: http://support.microsoft.com/?id=555375
We checked in the archive however people don't alwayes archive from the
Mailbox level as they should and instead do it for just the Inbox. What about
a migration (Moving a mailbox from one server to another), any chance that
could wipe out Calendar objects?
Judy Gleeson (MVP Outlook) - 04 Oct 2007 07:13 GMT
The Calendar is in the same file as the rest of their Outlook Data. So that
probably isn't the cause - unless they also lost the rest of their Outlook
data when you moved them?.

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Judy Gleeson
MVP Outlook
Trainer and Consultant
read my articles here: www.judygleeson.com
Canberra, Australia
how to post questions: http://support.microsoft.com/?id=555375
> We checked in the archive however people don't alwayes archive from the
> Mailbox level as they should and instead do it for just the Inbox. What
> about
> a migration (Moving a mailbox from one server to another), any chance that
> could wipe out Calendar objects?
Brian Tillman - 04 Oct 2007 13:16 GMT
> We checked in the archive however people don't alwayes archive from
> the Mailbox level as they should and instead do it for just the
> Inbox. What about a migration (Moving a mailbox from one server to
> another), any chance that could wipe out Calendar objects?
Right-click the Calendar folder, choose Properties, and select the
AutoArchive tab. Anything there?

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Brian Tillman [MVP-Outlook]