How to manually merge multiple PST files into one in Outlook? The items or features (like calendar information, email messages, contacts, and tasks) from the email account are saved into the PST file locally, which makes it easy for users to personally modify the contents of their account offline. How to Manually Merge Multiple Outlook PST Files into a single oneĮvery Outlook email account you added into the Outlook will have a corresponding PST file for offline use.
