
**Exchange OST File** - When Microsoft Outlook synchronizes with Exchange Server 2019, 2016, 2013, or other versions, an Exchange OST file is created. **Outlook OST File** - When Microsoft Outlook 365, 2021, 2019, 2016, and 2013 add an email account with IMAP settings, it automatically creates an Outlook OST file. Before we get into how to view an OST file without Outlook, let's go over the different types of OST files.

You can also select POP settings that generate PST files.

By default, Outlook configures your email account with IMAP settings that generate an OST file.

Microsoft Outlook is an email client that allows you to manage multiple email accounts on a single platform.
