Lotus Notes and Axiom question

Is there anyone that previously investigated Lotus Notes .NSF mailbox files in Magnet Axiom?

Conducting a second opinion case on an email investigation. Looking at the report of the previous DFIR company, it is stated that they conducted the investigation completely in Magnet Axiom.

As far as i am aware, .NSF files are not supported by Magnet Axiom and also the tests i have run on Magnet Axiom failed. The files can not even be selected as a source within Axiom.

So a little mistery here. But maybe they converted the file to a PST file or used some other work around i am unaware of, however it is not mentioned anywhere in the report.

Thanks and cheers!