The tool can merge multiple PST files, including emails, calendars, contacts, journal, notes, etc. into a single PST. It maintains the original folder structure and contents while merging the information of multiple ‘matching’ folders. The software also allows merging the user-specified files without the need to merge the complete PSTs.
Stellar Merge Mailbox for Outlook can also ‘join’ PST files of different Outlook versions. The software joins the PST files by generating root folders for holding the child folders from source PST files. It organizes the child folders in a structural hierarchy in the final PST while preserving the original contents after combining the files.
The merge PST software allows merging or joining of Outlook PST files of any size – small or large. The user can install and run the software to merge or join PSTs on system running Windows 10, Windows 8.1/8, or Windows 7 OS.
The merge PST files software provides the option to remove duplicate items while merging the PST files. It can remove the duplicate items based on Subject, Sender Email, Text, Sender Name, Recipient Name, Internet Header, Attachments, and Date and Time of Sending. It provides Default and Advanced Duplicate Criteria to remove the duplicate items effectively.
The software allows the user to exclude Deleted and Junk Items folders while merging PST files. This feature helps remove unwanted or scrapped items, thereby ‘cleaning up’ the data stored in the final, merged PST. The user can enable the option by clicking Exclude Deleted Folder and Exclude Junk Folder checkboxes.
The tool provides multiple options to save the merged or joined PST files. It can save the PST file in a new or the existing PST, Outlook profile, Office 365, or Exchange server. The user needs to select the output option while saving the final PST and specify the location to save the file. For Office 365 and Exchange server, the user needs to enter the login credentials and also the mailbox email ID and server name (when saving to Exchange).
The utility can merge password-protected PST files of the Outlook email client. The user needs to enter the password for merging the PST files. The feature allows seamless merging of multiple password-protected PST files.
The merge Outlook PST software generates a detailed log report comprising details such as process (join PST or merge PST), destination location, start and end time, source file, folder names, etc. The log report helps in reviewing the PST merge or join process details.
MS Outlook 2019, 2016, 2013, 2010, 2007, 2003 and Office 365
Standard & Toolkit
End User License Agreement
English, German, French, Italian & Spanish
Intel-compatible (x86, x64)
Windows 10, 8.1, 8, 7 & Windows Sever 2012, 2008
4 GB minimum (8 GB recommended)
250 MB for installation files
Yes. Stellar Merge Mailbox for Outlook software allows merging specific folders of multiple PST files, including the Contacts folder. It can also merge other folders such as Emails, Calendars, Journals, To-Do, and Tasks without merging all folders of the PST files.
When you join multiple PST files, multiple folder hierarchies of each PST file are created within a single PST file. On the other hand, when you merge PST files, contents of the respective folders such as Emails, Tasks, Contacts, Calendars, Journals, and To-Do are merged seamlessly in the final PST. The tool preserves the original files’ contents and structure in the final merged or joined PST.
Yes. You can merge the archived files of MS Outlook into a single PST file by using this software.
Yes. It supports different Outlook profiles for merging the PST files into one.
No. The merge PST software cannot merge damaged or corrupt PST files. You need to ensure that the PST files are in a healthy state before merging them. To merge the damaged PST files, you can first repair them by using a tool like Stellar Repair for Outlook.
No. It is not possible to join PST files without installing the MS Outlook program on your system.
Yes. You can merge or join multiple Outlook PST files into one.
The time to merge or join PSTs depends upon the size of PST files.