Emails missing from PST sometimes

I recently replaced an sbs 2003 server with sbs 2011. We have a small staff so I simply exported evryones email to pst re-created the accounts on the new server and imported the pst files. Everything is fine except for 1 user.

He was missing all of his sent mail. I re-imported the pst and it showed up. Now out of nowhere the sent mail has dissapeared again.

His pst is about 1.5gb and he also access about 4 other inboxes from his outlook profile, not sure if this could part of the problem.

Not sure what the problem could be.

Anyone have any ideas?
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

WORKS2011Managed IT Services, Cyber Security, BackupCommented:
by chance is auto archive pulling the sent items out of exchange and back into an archive.pst in his workstation profile.
lgg733Author Commented:
Re-imported again and again which seemed to get most if not all.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
lgg733Author Commented:
Best solution found
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.