Convert PST to OST And Import it Into Outlook [How to]

OST is a modern protocol and converting to it is simple

3 min. read

Updated onJuly 3, 2024

updated onJuly 3, 2024

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If you want synched copies of your emails and the ability to make changes offline, you have to convert PST to OST.

PST files are mail archives on your drive that don’t sync with your email client. In contrast, OST files are synchronize copies of your mailbox. They allow you to make offline changes that sync once you’re connected.

How to convert PST to OST

How to Import a PST file into Outlook

To complete this step, you need toknow the location of the PST file on Windowsand add it.

How do I open a PST file in Outlook?

To open a PST file in Outlook, you just need to convert it to OST and import it into Outlook. Follow the steps above to achieve just that.

Can I use an old PST files with Office 365?

Yes, PST files from older Outlook versions are fully compatible with Office 365, and they can be easily converted to OST files.

Why is Outlook creating OST instead of PST?

Outlook creates a PST file only if you’re using a POP3 protocol. If you’re using IMAP protocol, you’ll have to use OST format since IMAP doesn’t work with PST files.

That said, you canopen OST files without Outlook. Online alternatives like Group Docs app and dedicated software allow you to view and manage OST file contents without needing Outlook installed.

We also have a great guide on how tocreate PST file in Outlook, so don’t miss it. If you need to check the contents of the PST file, we have a guide on how toopen PST files, do be sure to check it out.

While the PST and OST files are the most used, you can alsoimport mbox file to Outlookby following the steps from this guide.

Do you have any questions as to how you can convert a PST file to an OST file? Leave us your questions and opinions in the comments section below.

Convert PST to OST And Import it Into Outlook [How to]#

How to convert PST to OST#

How to Import a PST file into Outlook#

How do I open a PST file in Outlook?#

Can I use an old PST files with Office 365?#

Why is Outlook creating OST instead of PST?#