I have several PST files collected from different Outlook installations and backups, and I need to convert their email data into PDF format. Doing this one PST at a time seems inefficient because some archives contain thousands of messages. I’m looking for a practical batch method that can process multiple PST files while keeping the exported data organized.

The PST files are not identical either. Some contain personal archives, while others are related to older business mailboxes. Before converting everything, I’d like to preview the contents and select the folders or emails that are actually needed. A date range filter would also be useful because I don’t want to convert years of unnecessary messages just to retrieve a specific set of emails.

While researching batch conversion options, I came across the SysInfo PST File Converter. Its product information mentions support for processing multiple PST and OST files and converting them to PDF along with formats such as EML, MBOX, MSG, CSV, DOCX, and PNG. The preview and search features also seem useful for checking mailbox contents before starting a larger conversion job.

Another requirement is maintaining the folder structure. If multiple PST archives are converted, I’d prefer the Inbox, Sent Items, and custom folders to remain organized rather than having all PDFs mixed together. The software documentation also mentions maintaining folder hierarchy and removing duplicate emails using criteria such as To, From, Subject, Bcc, and Body.

Attachments are important as well. Some of the archived emails contain documents that need to be retained. The available options include exporting attachments separately, merging them, or excluding them when they aren't required. There is also support for splitting oversized PDF output, which could be useful when dealing with large batches.

I’m considering a PST converter tool because manually opening each PST and saving individual emails as PDFs would take far too long. I’d probably start with a small batch to verify the output, folder organization, attachments, and date filtering before processing the complete collection.

Has anyone converted multiple PST files to PDF in batch? I’m particularly interested in whether folder-wise processing or processing all PST files together works better when the archives are large and contain duplicate or overlapping emails.