Conversion of  Thunderbird MBOX file to PST format is the best possible solution for users to open MBOX file in Outlook. It is the perfect solution for users to resolve the frequently asking query. MBOX to PST Converter makes all the task easier for users to move their Thunderbird data to Outlook in few seconds.

What is easy and fast processor to combine multiple outlook pst data file?

Download PST Merge Software to merge Outlook contacts, emails, calendars, journals and other email items into single PST file. This effective PST Merge tool merge PST file by three option- Merge PST file, Join PST files and Merge Contacts. This PST Merge Software supports all version of MS Outlook including the latest Outlook 16 and is compatible with all the versions of Windows.

To know the manual steps of PST Merge Software visit here: Use of PST Merge Software
 

What is the best technique to merge multiple PST data files into one?

Download PST Merge software which is smart solution that without any data loss merge multiple PST files in single PST file. This PST Merge tool takes less time in merging process and is one of the safe methods that give the advance option to combine PST files i.e. - Merge PST, Join PST and Merge Contacts as well as you can also Remove Duplicate Items and Exclude Deleted Items from PST file.

Read more at:  PST Merge software
 

If you have multiple PST files and you want to merge them in one PST file, try PST Merge tool to easily complete this task with simple mouse click. It supports both ANSI and UNICODE PST file and merge mulple PST files in one PST file without any data loss.

https://www.g2crowd.com/products/merge-pst-tool/details

I am in a need to export PST to PDF and thus searching for a tool to export Outlook .PST files into Adobe PDF files. 

Can anyone suggest any good tool to export PST to PDF files? 

If you're using Outlook Email client application where all your email saved in PST or Personal Storage Table file format then these two thechnique Split and Merge will definitely help you to come back from two major issues:

1. When have large size Outlook PST file.
2. When have large number of Outlook PST file in Outlook account to access.  

Split Technique: This technique will help you to break large size size Outlook PST file in some small PST files so that user can use data of large size file easily. 
Merge Technique: It will allow user combine and merge large number of Outlook email files in one single file.

You can take more information about both two technique from the link: Split and Merge Outlook PST file
 

PST to MBOX Converter (http://www.mozesoft.com/outlook-pst-to-mbox-converter.html) for Mac tool to convert Outlook Emails and their attached files to Mac Mail. Free Online PST to Mac Mail Converter can easily online purchase from our website with safe and secure procedure. Additionally import Emails, Contacts, Calendar, Tasks, and Journals etc. from MS Outlook to Apple Mac Mail. - See more at: https://softcart.wordpress.com/outlook-pst-to-apple-mail-mbox-file/