Sysinfo
PST Upgrade & Downgrade

Q: Software prompt error message: 'Please reinstall the application, some dlls are missing to install.' What am I missing to run the software?

The software relies on 'redemption.dll,' the core dll for functionality. It is a COM Dll, so it must be registered or present on the same folder 'software.exe' reside. Please make sure that dll is present on the above said location and try to install it using regsvr32.exe, a standard windows executable to register COM Dlls.

PST Upgrade & Downgrade is the most comprehensive Windows utility program for upgrading and downgrading Outlook email clients from the oldest to the latest versions and vice-versa. The primary function of this software is to convert ANSI PST files into Unicode format and Unicode PST files into ANSI format. Moreover, it can safely convert PST files without causing any alteration to the original files and keep them intact or unchanged after a successful conversion.

Upgrading Outlook client by converting ANSI PST files into the Unicode format.
It allows users to downgrade Outlook clients by converting Unicode PST files into ANSI format.
Support batch conversion of PST files (both ANSI and Unicode) at a time.
Auto-generate LOG file containing all the information of PST upgrade and downgrade operation.

(Average Rating 4.9 Based on 1025 rating)

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*SysInfo PST Upgrade & Downgrade Tool is Fully Secured Download Version.

Benefits of PST Upgrade & Downgrade

It keeps the original PST files intact or unchanged during upgrading or downgrading.
Preserve Meta-data information of selected PST files after the successful conversion.
Users can attach new PST files directly to their Outlook Office 365, 2019, 2016, 2013, 2010, 2007, 2003, 2002, 2000, 98, and 97 profile.
It offers a highly interactive and self-destructive interface to its users.
There is no need for prior technical expertise; you can still use this software easily.
It has smooth compatibility with all popular Windows-based Windows 11, 10, 8.1, 8, 7, Vista, XP, 2000, 98, NT, 95 operating systems, including Win 11.

Award & Reviews

The SysInfo PST Upgrade Software is best to upgrade Outlook PST file to a new format and gets 100% virus-free and safe award by Software Suggest.

Software Informer awarded this PST Upgrader & Downgrader as the most recommended utility for users to convert old PST files to new PST files.

When to Use PST Upgrade & Downgrade Tool?

When Need to Upgrade Outlook to Newer Version(ANSI PST to Unicode PST)

If you're upgrading Outlook from an older to a newer version, you must convert ANSI PST to Unicode. ANSI PST file is supported by Outlook 97 to Outlook 2002. The PST file saved in ANSI format has a 2 GB size limitation. To avoid this size limit and get more free space to store large mailboxes, Outlook users want to upgrade their Outlook clients. Hence, try the SysInfo PST upgrade Tool and upgrade PST files from ANSI to Unicode format to increase the size limitation.

When Need to Downgrade Outlook to Older version(Unicode PST to ANSI PST)

If you're downgrading Outlook from a newer to an older version, you must convert Unicode to ANSI PST. Unicode PST files are supported by Outlook 2003 and later versions. PST files saved in Unicode format have a size limitation of 20 to 50 GB, which is significant. But sometimes, users need to downgrade their Outlook client for reasons like you can't open a Unicode PST file in any older version of Outlook or open a Unicode PST file in Outlook 2002 or any earlier version.

Use When Need to Convert ANSI PST to Unicode PST in Outlook 2016, 2013 & 2010

Both Unicode and ANSI PST files are a part of Outlook versions. Still, in some cases, Unicode PST file is a better option for Outlook users as it provides enough storage space for storing mailbox data, whereas ANSI is limited to 2 GB Only. Moreover, there are more chances of Corruption in the ANSI PST file as it has a maximum size limit of 2 GB which is significantly more minor. Use the SysInfo PST Upgrade and Downgrade Tool and easily convert ANSI PST to Unicode PST Files.

Prominent Features of PST Upgrade & Downgrade Software

Upgrade ANSI PST to Unicode PST

The Software has been smartly designed to upgrade Outlook clients to the latest Outlook version from any old version. It can easily convert Outlook files saved in ANSI PST format into Unicode PST format. By upgrading Outlook, you can increase the mailbox size limitation of PST files from 2 GB to 20 GB.

Convert Unicode PST to ANSI PST

Another function of this software is to downgrade Outlook clients from the latest version to an older one. Older versions support the ANSI format, while New versions support the Unicode format. Switching back to an older version, i.e. 2002 or earlier, needs an Outlook downgrade, and this tool will help you do that.

Offers Batch Conversion of PST

Offers Batch Conversion of PST"

Converting multiple PST files at the same time is no more challenging. This SysInfo PST Upgrade & Downgrade Tool has an advanced feature that allows users to perform batch conversion of selected multiple PST files simultaneously in just a single click. Just make sure all the selected PST files are of identical format, i.e. ANSI or Unicode.

Auto-Search Outlook Data Files

Don’t worry if you no longer know where your PST files are stored on your computer. The auto-search feature of this ANSI to Unicode Tool allows you to search your PST files on your system in an auto-mode. You need to define the most probable location where you think the files are stored, and this tool will search them for you within a single mouse click. Read:- How to Fix Outlook Search Problem.

Add PST to Outlook

Users can add new PST files to their Outlook profile directly from the software; no need to add them manually. Before starting the actual PST conversion process, you need to check to Add a new PST file(s) in the Outlook profile box. You can also use our Add Outlook PST Software for multiple PST files addition.

Exclude Deleted Items

If you want to exclude the deleted items from the output PST files, check the "exclude deleted items" box in the software wizard before starting the PST conversion process, either Unicode to ANSI or ANSI to Unicode. This feature will not save the deleted items of your old PST files into a new file(s).

Remove Duplicate Items

Users can remove duplicate items from their outlook PST files to make them handy and compact using this software. Before the software can perform the actual PST upgrading or downgrading process, you can check the Remove Duplicates in the Outlook PST file(s) box. Further, to remove the duplicate items from the PST items based on different categories, you can also use the Outlook Duplicate Remover Tool.

Merge Contacts Option

Safe-to-Use Application

This SysInfo Upgrade & Download PST Tool is efficient enough to execute the entire PST conversion process, i.e. ANSI to Unicode and Unicode to ANSI, in a safe mode. No changes or alteration is made on the original PST files. It maintains the Meta-data information throughout the operation of upgrade or downgrade.

Easy-to-Use & Interactive GUI

The interactive user interface makes this software convenient and easy for non-technical and complete novice users meaning that no prior technical knowledge is needed to use this software. In Addition, this software's "auto-log generation" feature generates a log file at the location shown before the conversion process gets completed.

Supportability of Outlook Version

The Software supports PST files saved in both ANSI and Unicode formats and created by any older and latest version of Outlook like ANSI PST files of Outlook 97, 98, 2000 and 2002, and Unicode PST files of Outlook 2003, 2007, 2010, 2013, 2016 and the latest 2019. Read:- How to Determine MS Outlook Version?

About Product	Version 8.0	License Multiple User	Edition Home, Administrator, Technician, and Enterprise	Release Date 23 March 2022
Requirements & Supported Versions	Pentium class processor	Minimum 512MB RAM (1GB Recommended)	Disk Space: Enough Space to Store Recovered Output.	Support Windows: 11/ 10/ 8.1/ 8/ 7/ 2008/ 2012(32 & 64-bit), etc.
Requirements & Supported Versions	Support Outlook: Office 365, 2019, 2016, 2013, 2010, 2007, 2003, 2002, 2000, 98, and 97.

Product Features	Free Version	Full Version
Offers Multiple Options like Add files, Search, Remove, Remove all.
Display PST file information like size, type, and name
Convert ANSI to Unicode
Convert Unicode to ANSI PST
Option to exclude deleted and duplicate items
Attach new PST files in Outlook profile
Upgrade & Downgrade PST files	25 Items(Each PST file)	All
24*7 Tech Support & 100% Secure
Price	Free	$49
	Download	Buy Now

Frequently Asked Questions

Listed Commonly Asked Question and their Solutions

How to convert Outlook PST File from ANSI to Unicode?

You need to follow the steps below to convert the Outlook PST files from ANSI to Unicode:

Start the SysInfo PST Upgrade & Downgrade Tool.
Click on the Add PST Files button to browse PST.
Just preview the browsed one and click Next.
Now, the select path for the resultant folder.
Enable the radio button of Convert ANSI to Unicode.
You can also add your PST file into Outlook directly.
Here, one can also remove deleted & duplicate items.
Click the Convert PST File button to start the process.

How to convert old PST File to new format?

The only need is to perform the steps below:

Firstly, start the SysInfo PST Upgrade Tool.
Browse the old PST file from your system.
After adding the required one, click Next.
Select the saving path for the output folder.
Opt for the Convert ANSI to Unicode option.
Finally, click the Convert PST File button.
A log report is also generated on your PC.

How do I make a backup copy of a PST file?

Follow these steps to make a backup copy of your PST file:

Close MS Outlook before backing off your .pst file.
Open the Control Panel in your system.
Double-click the Mail icon
Click "Show Profiles"
Click your configured profile, and then click Properties.
Click Data Files
Under "Name," click the Personal Folders Service that you want to back up. By default, this service is called Personal Folders.
Click "Settings," and then note the path and file name.
Close all the Properties windows
Now you can use the PST file which you noted in step8.

How do I export PST file data?

Follow these steps to export your PST file data:

Open MS Outlook.

Go to the File menu click Import and Export.
Click Export To File, and then click Next.
Click Personal Folder File and then click Next.
Click the folder that you want to export, and then click Next.
Click Browse and select the location where you want the save new .pst file.
In the File Name box, type the name you want to use for the new .pst file, and click OK.
Click Finish.

Software prompt error message: "Please reinstall the application, some dlls are missing to install." What am I missing to run the software?

The software relies on "redemption.dll," the core dll for functionality. It is a COM Dll, so it must be registered or present on the same folder "software.exe" reside. Please make sure that dll is present on the above said location and try to install it using regsvr32.exe, a standard windows executable to register COM Dlls.

The standard command to register COM dll on your system is:

c:\> regsvr32.exe "[path of program folder]\redemption.dll" There is a chance that you have installed various other email migration tools from different vendors on your system, and they also use the same core DLL but different versions. COM Dlls are system-wide available, so their installation can also cause this behavior of the software. If possible, then try to uninstall them from your system. If the problem persists, please email us again at support@sysinfotools.com and mention your OS and the MS Outlook versions. It will significantly help us to identify the problem. If you have another system at your disposal, you can install our demo version on that system and check for this behavior. If things work on that system, then without uninstalling the demo version, install the full version and send us a new .info file at sales@sysinfotools.com, and we will issue a new software activation key.

Does this software support up-gradation of password-protected ANSI PST Outlook File?

Yes, you can use this software in the case of a password-protected Outlook File. It's also possible to upgrade a password-protected PST file with the help of this software. Check out the blog How to Encrypt PST Files in Outlook 2010 and 2007?

I want to compress the size of the PST file. Can this software work for downgrading a Unicode PST to ANSI file format?

This software works in two ways as PST Upgrade Software deals in upgrading and downgrading file types.

Does this software also work with corrupted or damaged PST files?

You need to have PST files recovered to use this PST upgrade and Downgrade software. To recover PST files, you can use another highly-recommendable PST File Repair Tool.

Do I need to have MS Outlook installed on my system for this software to function?

TIt would be best to have MS Outlook (2000/2003/2007/2010) installed on your system before running the software.

Client Review

I had recently received a PST file, but that was of the older PST version. I did not face any compatibility conflict, as my problem gets resolved with the PST Upgrade Tool, which allows me to convert ANSI PST to Unicode PST formatting. Thank you, SysInfo Team.

Nathaniel Patrick| Denmark

I have seen many applications online serving PST upgrades with reliability claims as a technical person, but none could safely convert Unicode PST to ANSI PST. PST upgrade and downgrade from SysInfo did the job efficiently and converted my multiple ANSI PST files into Unicode PST.

Lorena Williams | Jersey

As a professional, I must work on Outlook email for the comprehensive type of official work and be stuck entirely when I got to work on an older version of the PST file and had to compromise on my output. Then, one of my friends recommended this SysInfo PST upgrade tool that worked well to convert ANSI PST to Unicode PST formatting easil

Dianna Welch | Canada

For the past few months, my Outlook had not been functioning correctly as there was a PST file that became oversized, slowing down the performance. The PST upgrade and downgrade is the one that can be relied upon to be an authentic solution for up-gradation purposes. Great product!

Ramon Weber | Canada