For a while, a pain point for our LibreOffice endpoint is that it struggled with converting email files to PDF. The file extension for these were often .eml or .msg.
People would need to either convert email files to PDF format in large batches, or they are using PDFs as a form of File Preview when an end user uploads a file, and showing a preview of a .msg or .eml file is helpful in that regard.
However LibreOffice struggles to open those files, or at least when they do, the text is garbled and not formatted properly.
We have since enhanced our LibreOffice endpoint to properly convert .eml and .msg files to PDF format.