I’m still having trouble migrating a 14GB Outlook.pst file to Thunderbird. Without that, my migration to Linux is on hold.
Then there’s an equivalent for multilayer Acrobat, which is another can of worms.
Is it the size of the file that’s making things difficult?
Windows 11 disabled my Thunderbird.
https://www.wikihow.com/Import-a-PST-File-to-Thunderbird
Seems a common method is creating a gmail account, connecting it to your outlook account via IMAP, getting all your outlook into gmail, then setting up gmail as an email account in Thunderbird to get the copy of outlook that you made in gmail, into thunderbird.
That would likely only save the headers on your PC which is standard for Thunderbird. You have to make it to download everything. I don’t know if you have to make gmail pull more than just headers in. As data hungry as they are, I would suspect they pull it all in by default.
Linux is a little lacking for dedicated programs for PDF file creation.
Neither LibreOffice Writer or Calligra Words will Save As pdf.
Inkscape, a vector drawing program will Save As pdf.
GIMP, a photoshop like program will Export As pdf.
Both have Layers.
LibreOffice Draw will Export As pdf but is not as robust as the above two graphics programs.
There are also a few pdf utilities like PDF Slicer available. Plenty to merge as well.