Merge PST Files

Merge PST Files is an Outlook utility for combining several PST data files into one or more new PST files. It is meant for cases where Outlook archives or PST files from different Outlook profiles need to be merged, and it can work with PST files connected to Outlook as well as archive files stored on a disk or network share.

The utility creates new PST files rather than altering the source files. It can merge PST files without limits on the number or size of files, can split the combined output by size if needed, and can merge only selected Outlook items. It also offers options to skip or replace duplicates, skip deleted items, and use macros in file and folder names inside merged PST files so the processed data can be sorted automatically by criteria such as dates, senders, recipients, and other item fields. A completion report shows how many items were copied, skipped, or replaced for each PST file. The page also states that merging can be automated, including running on a schedule, and that command-line use supports batch files and scripts.

It is described as a stand-alone application and can integrate with Outlook optionally. The utility is for non-commercial home use only, and it will not run in a domain environment. A free limited version is available, with an advanced version offering some features and domain-environment support. The page also lists version 5.1 and system requirements for Microsoft Office Outlook 2007 through Microsoft 365 on Microsoft Windows.