Hi @Guavity
Welcome to our forum!
How did you export PST files? And could you please provide a screenshot of the issue? (In order to avoid privacy leakage, please remember to hide your personal information.)
Please kindly understand that the Outlook tag here we mainly focus on general issues about Outlook desktop client. Therefore, you may refer to the link to learn how to export from Outlook Desktop Client.
In addition, i found an article about How to export a PST file from Microsoft 365, you may refer to it and have a try. (Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.)
Hope it helps!
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