
The OLM (Outlook for Mac) file is similar to the PST, but it's a data file created solely for Outlook for MacOS. (E.g., completed a Draft message, changed an appointment, etc.) Drawbacks, however, include the fact that OST files can only be used by the Outlook account that they were created for, and you can't re-use or move an OST to another Outlook installation. When the connection comes back, the OST is again synced to the mail server, as are any changes to any data that you've made. The benefit of the OST is that it allows you to have access to your Outlook data even when you're offline: on a plane, during times when there's an internet outage, etc.
Reddit.com convert olm to pst Offline#
The OST file (Offline Storage Table), on the other hand, is an offline data file that basically mirrors a PST, but doesn't offer the same flexibility. PST file into Outlook for Mac! So, if you have a PST from an account, you can import it into any Outlook installation: on a second computer, on a new computer, etc.

The PST can also be copied to other installations of Outlook - You can even import a. You can even move items from a mail server into a PST, thereby freeing up storage space you have on that mail server - so if your email provider has a limit to the amount of email space you have, using your PST is a good way to regain some space on their server without losing any of your data. It's also not deleted by Outlook if you remove the account. It can be exported, imported, and can be used to backup and/or export items from any mail account you have. It basically contains your email messages, contacts, calendar items and other Outlook data and is stored on your local machine. The PST (Personal Storage Table) file is a personal data file and is most commonly known as your "Outlook Data File".

So, here's a quick article explaining the difference between the 2 file types, and what they mean for SmarterMail users. People who know what an Exchange server does, and who are adept at working with Microsoft Outlook are, no doubt, familiar with these two file types.

If you've ever dug around in your AppData folder - and, let's be honest, who hasn't done that - you may notice a couple of different file types in the Outlook folder.
