Outlook 2010 problem with convert


New Member
Outlook version
Outlook 2010 64 bit
Email Account
Exchange Server 2010
Hello , faced such problem , a Trojan virus ate the original OST file , is it possible to convert it after restoring to PST , if Yes then how ? please tell me...

Diane Poremsky

Senior Member
Outlook version
Outlook 2016 32 bit
Email Account
Office 365 Exchange
The ost file is just a local copy of the mailbox on the server. If a trojan ate it, the mailbox will resync. If it deleted the mail, then you'll need a backup file - if you have a good copy of the ost, you may be able to restore it to Outlook (if it was created using the same profile) and export to a pst. Do this while outlook is working offline. Go online and import the pst to the mailbox to restore mail.

If outlook won't accept the backup ost, you'll need to use an ost to pst utility. I have a list here: Convert an Offline File (.ost) to a Personal File (.pst)