Here’s how and where to look.
SelectAccount tweaks>Account tweaks.
You’ll find the location of yourPersonal Foldersfiles next to each email account that is set up in Outlook.

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SelectOpen File Locationto pop fire up folder where your Outlook data files are stored.
Email messages for Microsoft Exchange, Microsoft 365, and Outlook.com accounts are backed up on your email server.
In most cases, these types of accounts do not have Personal Folders files.