Before moving to the solution to merge Outlook data files together, first, let's know about the PST file.Introduction of Outlook PST FilePST file is known as Outlook data files which contain all Outlook items including emails, contacts, calendar data, notes, journals, and more.
The size of the PST file is limited to different versions of Outlook, for example- PST files in Outlook 2000 and Outlook 2002 were stored in ANSI format and have a maximum size of 2 GB, while Outlook 2003 and Outlook 2007 save the PST file in Unicode format and have a maximum size of 20 GB.
Some of them are listed below:-If the user merges multiple PST files into one, he/she can easily manage their data.Multiple data files can affect the performance of the Outlook application.Large Outlook PST data files can be misplaced anywhere and accidentally deleted.Outlook does not support the simultaneous import of multiple PST files.Users can not share multiple files, whereas a single PST file can easily be shared with others.Users can easily access their PST files from multiple accounts at once place after merging.Manual Method Combine Multiple PST FilesMicrosoft does not provide any inbuilt utility in Outlook that helps users to merge Outlook data files into a single file.
Now for combining Outlook PST files, we need to merge all existing data into the newly created PST file.
Browse to select the .pst file to import and check the “Do not import duplicates” box.
You need to import the PST file by one after one into Outlook.Quick & Secure Solution for Combining Outlook PST FilesIf you are looking for an instant way to merge Outlook data files, you must download SysTools PST File Merge Tool.