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As the owner of an IT Support Providing company, I often get instances with clients that have developed problems with their installations of Microsoft Outlook, and subsequently look to me for help.
I have tried many free and commercial solutions, but the free ones rarely cut the mustard, and some of the commercial products I have tried to date fell short in some way. So, I finally decided to give “Stellar’s Outlook Toolkit” a run.
This article is a recount and review of some of my experiences and tests of the product.
Stellar Outlook Toolkit includes many features, including Repairs of PST Files, Splitting large PST files, Compacting, Converting OST to PST, Merging PST Files, Recovering PST File passwords and a tool to remove Duplicate Mail. As it claimed to do it all, I must admit it made me a little skeptical at first.
After installing and opening the software, you get presented with the following interface.
Stellar “Repair PST File” Module
I had a Corrupt Outlook PST file which I'd already repaired using another tool I owned. The corruption indicated that the PST file I was sent by a client was "not an Outlook data file (.pst) when I tried to open it, but I knew it was, so I decided to test if Stellar's solution could repair it. Clicking on the "Repair PST" icon, I was presented with the following;
I first use Browse (1.) to enter the corrupt Outlook.pst file into the utility, then clicked the Repair (2.) option as shown above. Note that the "Find" button simply allows you to find where the .pst file you want to repair is located in case you're not sure where it's located.
Clicking the Repair button started the repair process as shown below, with relevant progress bars.
Once the repair process completed, I was presented with the following result.
(Note that any identifying information has been blurred out in the image below to protect the PST owners privacy)
I then decided to Save the Repaired file as indicated below and was presented with a variety of options. I decided to "Save as PST" and to "Save PST Normally" from the advanced options and clicked the OK button to complete the save.
The following screens were then presented to me
Clicking the How to import PST file? Hyperlink brings up a useful Help File from within the software itself to give easy to follow instructions.
Having closed by clicking the OK button in the second image after the repair, I went back to my Outlook and tried to open the repaired PST file and was pleased to find that the PST file had been repaired correctly, with all Email messages and folders intact.
Pleasing also to note was that it left the Corrupt PST file intact in case anything went wrong with the repair and that it just renamed the repaired file as "email@example.com Repaired.pst" An excellent result and the process was very easy indeed, with no technical knowledge required.
Encouraged by that result, I next decided to try out the Split PST function on a PST file of my own that was close to 2GB in size.
Stellar “Split PST File” Module
Clicking the Splitting a PST File option presents you with the following screen.
Clicking the Drag & Drop to add PST presented me with a standard Windows 10 folder/file selection window, so I selected a PST file I had that was just over 1.6 GB in size. Once selected, I was presented with quite a few helpful options to Split the file with. See the next screenshot.
I decided to go with the “By Date” option and in the “Date Range” then selected Between 1st Jan 2017 and 1st Jan 2018 for the Date Range and clicked the blue “Split” button. Stellar Outlook Toolkit went to work on the process and provided a neat little animation that assured me something was happening while I waited.
It’s a good thing that it did too, as the operation did take some time to complete and I would have been concerned that nothing was happening without it!
At the end of the process, I got the “Splitting completed.” Message and Stellar created a folder named “StellarSplitter_24-03-2018 20-34-06” in the location I’d specified which contained an “Outlook Split.PST” file that was 405,993 KB in size! The original PST file was left untouched, which gives the opportunity to split it again using different splitting criteria.
I opened the split file in Outlook 2016 and was pleased to find that the split file did indeed only contain messages from 1st Jan 2017 to 1st Jan 2018. All folders were intact, and the PST file performed flawlessly. Even my Contacts and Notes were those that had been entered between the dates I created. Well worth the wait for the process to complete and a tool that can be invaluable if you want to split your PST files into certain dates for organizational purposes. Brilliant!
Compacting a PST using "Stellar Compact PST" Module
To test this function thoroughly, I first made a copy of my 1.6 GB file and performed a Compact function on it using Outlook’s built-in compacting tool.
Compacting Results using Outlook's "Compact Now" Function
I then restored my original uncompacted PST file and ran the same process using the “Stellar Compact PST” function. The first thing that happened was that I was advised that an add-in had been added to my copy of Outlook.
Clicking “OK” gave me a series of different compacting options to try. To make the test fair and comparable, I selected the following options for this compact test after adding my Outlook.pst file into the windows presented:
And then I clicked the “Compact” button. Note that Outlook needs to be closed during this operation.
Once again, the software provided a neat little animation to show that things are happening while you wait for the process to complete. Once again, a good thing it did, because the process took considerably longer than Outlook 2016 built-in compacting function.
After compacting had completed, Stellar provided the following screen, with a helpful link to how to import the compacted file back into Outlook.
Compacting Results using Stellar Compact PST function
So, in summary:
An additional saving of 332,816 KB by using Stellar Outlook Toolkit to compact rather than Outlook’s built-in compacting tool. This goes to show that Stellar does a much better job of it!
I did try the other options available with the Stellar Compacting tool, such as;
And though the results were “considerably” better than just a straight compact operation, I’ve not included them in this review because Outlook does not provide such advanced features.
A warning note for those using Stellar Compact PST with a
Microsoft Outlook 365 subscription.
Stellar Outlook Toolkit ran into problems with this (and only this) compacting function when tested on my Office 365 Subscription package and crashed when it tried to compact my PST.
After spending several hours troubleshooting the crash with Stellar’s excellent Support staff, including them logging into my system remotely, it was finally found that the problem was with Office 365 itself and not with the Stellar Compacting module.
A portion of the concluding reply from Stellar support is included below;
"We would like to inform that you are using the subscription version of the MS Office 365 which is not a stable release from Microsoft and that's the reason Microsoft keeps on releasing the regular updates for it.
We recommend you to use any standalone version of MS Outlook. You can even use a standalone version of MS Office 365."
To verify the above for myself, I did install a standalone version of MS Office 365 into an Oracle Windows 10 Pro Virtual Machine to test the theory, and it turned out Stellar Support was perfectly correct.
The Compact PST function worked perfectly in a standalone version of Office 365 Outlook 2016.
Stellar "OST to PST" Conversion Module
An OST (Offline Storage Table) to PST conversion is a very useful function if you plan on disconnecting from an Exchange or IMAP server for good, or if you want to make a local backup of your OST file. I gave Stellar OST to PST a run to see how well it would perform. Here’s how it went…
Clicking the OST to PST option presented me with the following screen.
The conversion process went a lot quicker than I expected and at the end of it, I was presented with a host of information about the contents of my OST file, and given the option to “Save Converted File” at the bottom left of the screenshot.
I clicked the “Save Converted File” and got some options about how and where I’d like to save the newly created PST file.
As you can see with the above screenshot, there are several options, but I decided to just leave everything as default and clicked the OK button. Here’s the result.
Once again, Stellar provided a helpful “How to import PST file?” instruction for those that aren’t familiar with that process. Happily, I discovered that my original OST file was left untouched and Stellar OST to PST Converter created a new file named “MyEmailAddres@gmail.com Converted.pst.”
Upon opening the Converted PST file in Outlook, I found that everything converted and mirrored the contents of my OST file perfectly. So that function too, worked exactly as I expected. A great result!
Stellar “PST Merge” Module
Next thing to try was how well the PST Merge function would work. I had a couple of PST files that I often open, so decided to merge them to see how this all worked. Clicking the option in Stellar Outlook Toolkit gave me the following screen.
I decided to try the Drag & Drop method of selecting PST files this time, so using Windows File Explorer, I highlighted the 2 PST files I wanted to merge and dragged them into the above window. That gave me the following option:
After clicking the “Next” button, Stellar went to work, did the job very quickly and asked me where I wanted to save the Merged PST files. I selected a Temporary location using “Browse” and hit the “Merge” button.
Note there are also a variety of other options available to you at this point, such as Joining PST’s as separate folder structures, which also worked well. I went with the default to just merge the two to a new PST file and hit the “Merge” button.
Another nice animation to reassure me that things were happening and once the process was completed, I got the following:
Clicking the “Open folder” link took me to a folder in C:\Temp\StellarMergePST25-Mar-2018 04.04.42 where a new Outlook.pst file had been created. I opened Outlook, loaded the newly merged PST file and started examining it. Once again, Stellar Merge PST didn’t disappoint. All the folders from both PST files that I selected to merge were there, with all contents intact, including Calendar, Contact, etc. information. Sensational result!
Stellar “Recover PST Password” Module
I’ve never had very much luck with Password Recovery utilities, so I wasn’t too confident with the included Password Recovery tool in the Stellar Package either, but for the sake of completeness, I password protected my PST file to see if (and how long) the Stellar software Recover Password module would take to help me get my password back if I had forgotten it.
The Password I placed on my PST file was 7 characters long, contained both capital and lower-case letters, as well as a few numbers. It was not comprised of a word that could be found in a dictionary, rather, some random letters that I would use to create a password to use for protecting something important to me. I also did not tick the option to “Save this password in your password list” in Outlook.
Having set a password on my Outlook.pst file, I fired up the Recover PST Password module and loaded my file.
With very low expectations, I hit the “Find Password” button to see what would happen.
Within seconds, Stellar Phoenix Outlook Password Recovery identified 6 passwords, NONE of which were my actual password, yet ALL of them worked to open my PST file!
Not satisfied it could work that well, I decided to give it a much more difficult task and created a 12-character password, including 3 capital letters, 2 numbers, and a special character as well. I then put it to the test again. Here’s the password I used – Wdfr^sA8i3Wq for the second test.
Again, in mere seconds, Stellar Outlook Password Recovery presented me with a series of 6-character passwords that all worked to open my Outlook.PST file.
To say “I was totally amazed at this result” would have to be the understatement of the year!
Not a single other utility I’ve tried in the past, either free or commercial performed like Stellar’s solution. It makes me wonder what the point is for password protecting a PST file in the first place if a utility like this can crack it so easily. An absolute Thumbs Up from me for the Stellar Recover PST Password utility. Amazing performance and result!
Stellar “Duplicate Mail Remover" Module
The last thing to try was the Duplicate Mail Remover. This turned out to be a powerful little tool indeed.
Clicking the option inserts an add-in into Outlook in a custom Tool Bar.
Clicking the “Stellar Outlook Duplicate Remover” add-in button while in Outlook produces a scan window that looks like this:
Hitting the “Next” button provides you with a multitude of options to select.
An explanation of the various options is worthy here.
“Select Time Span”
Clicking this drop arrow allows you to select the period you want the Duplicate remove function to process.
Select Action allows you to tell the Duplicate Remover what you want to be done with the duplicates that it finds, from moving them to the deleted folder, right down to just deleting duplicates permanently. See below.
I selected “Text,” “Subject,” “Sender Email,” “Internet Header” & “Attachment files” for my test.
I also opted to Delete (Move to deleted items folder) after clearing my deleted items folder first and then hit the “Run Process” button.
Here’s a snapshot of it working away after clicking the “Run Process” button:
At the end of the process, you get the following screen:
After clicking the OK button as shown in the top graphic, you get the opportunity to Save a Log of everything that was done in Text (.txt) format. I saved my log, and everything was listed as expected.
Having checked my processed Outlook file, all duplicates were indeed in my Deleted Items folder just as I wanted them to be. The process took a while to complete, however having checked the results thoroughly; I can verify that it works very well. Thumbs Up!
The “Stellar Outlook Toolkit” was tested on the following System Specifications
Motherboard - Intel Corporation DH67CL (LGA1155) Version (AAG10212-208)
CPU - Intel Core i7 2600 @ 3.40GHz - Sandy Bridge 32nm Technology
RAM - Total Physical 20 GB – Type DDR3
Graphics - V243HL on AMD Radeon HD 5500 Series
Hard Disk Drive - Samsung SSD 850 PRO 512GB
Operating System - Windows 10 Professional (64-bit)
Microsoft Office 365 – 32-bit install
Authors Final Note and Disclaimer
Apart from being granted a valid Key for full functionality testing of this product, neither I nor my company (Andrews Computer Help Zone) has any professional affiliation with Stellar Data Recovery. I am simply a user of this toolkit. This product was tested and reviewed in late March of 2018.
The Stellar Outlook Toolkit may be Trialled and Purchased using this link
I am an IT Professional, Freelance Journalist and an all round good guy! :)
I can be contacted for additional information by simply accessing my Profile Page at Experts Exchange.
If you found this review interesting and helpful, please do click the Thumbs Up symbol to the bottom left of this article. It provides me with positive feedback and really helps me out!
All contents of this review are ©Copyright 2018 to Andrew Leniart. None of the content of this document may be copied or reproduced without the express written permission from the author.