To save Outlook emails as PDF in btach, I suggest the best and simplest Advik Outlook OST Converter Tool. This is the safest way to convert Outlook emails to PDF format without any hassle. Without technological expertise, users can utilize this software with ease. Every version of Windows OS and Microsoft Outlook is supported. Apart from PDF, it allows you to save Outlook emails to hard drive into various other formats such as MBOX, PST, EML, HTMl, etc. The demo version is also available for free, which allows you to export 25 emails from each folder without any cost.