From your mentioned description, I have searched, but did not find any official information article to map PST file into the Microsoft 365 Outlook application.
If your concern is something like to import PST files into the Microsoft 365 Outlook desktop application, you may import or open PST file into the Microsoft 365 Outlook application from the below mentioned information articles:
If the above mentioned information does not meet your requirement, please kindly contact to this third party Flank Speed support provider, they will further assist you about your concern requirement.
Regards, Darpan
* Beware of Scammers posting fake Support Numbers here.
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