Need to convert an .OST file into a .PST file.

Discussion in 'Windows Small Business Server' started by bobk, Apr 29, 2005.

  1. bobk

    bobk Guest

    How can I convert a user's .ost file into a .pst file? The mailbox has NOT
    been deleted., if that matters.

    bobk, Apr 29, 2005
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  2. bobk

    Russ Guest

    Russ, Apr 29, 2005
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  3. bobk

    Allen M Guest

    Nothing to convert. Just create a new pst file. Just make sure the ost file
    been synch first.
    Allen M, Apr 29, 2005
  4. bobk

    bobk Guest

    OK, so do you mean that I can a new POP3 account which will download
    everything to a pst file? And then I can just remove the cached Exchange
    bobk, Apr 29, 2005
  5. Curious if this works. Will your Outlook open offline in cached mode? If so
    try to export the mailbox as a PST locally. Then do what ever it is you are
    trying to do and import the PST you created back in or choose open PST file
    and choose the one you created the open it. Sorry if I missed something...

    Dirk-Thomas Brown, Apr 29, 2005
  6. That would work and wouldn't require the tool I mentioned in the
    earlier crossposted entry.

    If you do have an orphaned OST file that's lost its MAPI profile then
    you would need the aforementioned recovery tool.
    Mark Arnold [MVP], Apr 29, 2005
  7. bobk

    Russ Guest

    This sounds great because $599 sounds rediculas.. LOL
    Russ, Apr 29, 2005
  8. bobk

    bobk Guest

    Thanks Mark. I think that will take care of it. If you have time, I'd
    appreciate advice on what it takes to screw things up so bad that someone
    would HAVE to actually convert an .ost to a .pst file. I've recently been
    told that deleting a mailbox would do it. What other things do I need to
    make sure that I don't do?

    Thanks for the help!
    bobk, Apr 29, 2005
  9. bobk

    Allen M Guest

    Maybe I'm missing something here. Is this an .ost that is no longer
    associated to a valid email account? If you can log onto your network and
    open Outlook then synch your .ost to your Exchange server then exporting to
    a .pst file should be all that simple. Should it not? Why does he need a
    third party tool to do this?
    Allen M, Apr 29, 2005
  10. If the mail profile is still there, just set Outlook to Work Offline. It
    will then access the OST as though your connected to the Exchange server.
    Create a new PST and copy all the folders to it. All done.
    Brian Tillman, Apr 29, 2005
  11. See:

    XCLN: OST and PST Quick Reference

    Because an OST is stamped with a mailbox's unique ID, if a user's
    mailbox is deleted and re-created on the computer running Microsoft
    Exchange Server, the OST file does not synchronize with the new mailbox.
    The only way to recover the data in the OST is to use the following
    steps exactly before starting the client online: 1. Start the Microsoft
    Exchange Client in offline mode, using the same profile that was used
    before with the OST.
    2. Add a PST to the profile.
    3. Copy the messages to the PST.
    4. Create a new profile that connects to the new mailbox.
    5. Move the messages from the PST to the new mailbox.
    Henry Craven [SBS-MVP], Apr 30, 2005
  12. Like Henry said, if you end up with an OST file and no mail profile
    that it belongs to then your OST is effectively screwed. Well, the OST
    isn't screwed but the fact that there's no MAPI profile means that
    it's no longer of any use in it's current form.

    Yes, that happens, with depressing regularity!
    Mark Arnold [MVP], Apr 30, 2005
  13. bobk

    Jim Nugent Guest

    I haven't used Exchange for a while, but a couple of tricks come to mind:

    1. See if there's anything on the Import/Export menu (you've probably
    already thought of that).
    2. "Archive" the entire .OST file (perhaps by temporarily adjusting your
    archive setting to "everything, every day"). The result will be a .PST file.
    (Can't remember if I've tried this but it should work...)
    3. Brute force drag everything from you online mailbox to a Personal Folder.
    (may not be pleasant but it works --- I've done this.)
    Jim Nugent, May 5, 2005
  14. ExchangeRecovery 2.0 is a commercial product that's supposed to convert
    an OST file to a standard PST that you can then reimport into Outlook;
    more info at

    Haven't used it myself, though...

    Best regards

    Sao Paulo - SP - Brazil
    Marcello Marques, May 5, 2005
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