How to Merge Outlook Archive Folders - Version 3.0 How to merge Outlook archive folders is a common query for those users who have multiple archive files. In order to manage these archive.pst files, it is recommended to merge Outlook archive PST files. Via PST merge software, you can merge Outlook PST files as well as merge Outlook archive file as well.Merge PST files software is very reliable and a multi-featured tool to merge Outlook archives files. PST Merge software is capable to provide 100% safe result because of its very sophisticated and advanced features which are summarized under -* It is able to merge UNLIMITED MS Outlook PST files within one PST.* Fast, effective and accurate merging of data without any loss of important information.* Create a common folder for all contacts in various PST files by merging contacts folder* Supports Windows operating systems like 98, 2000, 2003, XP, Vista & Win 7.