How to repair Outlook 2016 that won't open the PST file

Thanks to the program I can recover my email history

Amazing Proto Class program

Thank you. This application is very useful.

first time using this, hopefully it helps recover my acadmic materials...

good app

Amazing

He saved my life

The program works quickly and very well, although it did fail with one folder (but other programs did too). Overall, 10/10.

good tool

Impresionante, no imaginé tal eficiencia, muchas gracias.

These guys are great. I was able to recover the 5 most recent emails from each and every sub folder. This is the free version. It's a life (email) saver. Thank you.

80 años. Retirado. RECOVERY,TOOLBOX, facilísimo de usar. Fabuloso.

This is gold.. loved the service

I accidentally deleted files in my email inbox, and I was able to recover many of the deleted files using your tool.

:=)

I lost the files after a computer crash.
Had to re-install windows.
I want to recover all pst, and ost. Files.

canot tell 100000000 thanks

Repairing a damaged PST file. I was able to recover most of my emails.

nice

Excelente programa, mis felicitaciones.

super recovery, very fast and did a perfect job, can recommend to any one looking for recovery software.

100% ist Gut!

Hello Recovery Toolbox team,
thank you very much for your support. One of my PCs froze, forcing me to do a hard reset. At the time, Outlook was open. After the restart, Outlook could no longer find the PST. Renaming the PST wasn't possible, even in safe mode. Apparently, a program was accessing the PST even though Outlook was closed on all computers. A Google search led me to your tool. After the repair (2-3 hours), I was able to save the PST under a new name and use it again.
Thanks again.
Best regards, Dietmar Kroschel

I needed to access OST files on an old hard disk. As I don't use Outlook as email client, I needed to find a tool. I was not recovering from corrupted data.
Thanks for making the tool👍

Feels good! i like it! thnx for devs

its workilng very well in 2025 thank you

Great program, really helped me out!

Excel.lent! I couldn't with other applications and this one worked the first time!

Good program

sir best softwear for everyone . Thanks

Tank you very very much the software is help full

Had my agenda only in the ost, so not synched to the webmail.
After making a new profile my agenda items were gone. Used the Recovery tool for Outlook to restore the items to a PST from a backup of the old OST files. And then copied them back to my agenda.
This worked well although only the agenda item are restored, not the attachments and extra information field.

VERY GOOD

Really works. It identifies the bad sectors and skips them while getting rest of the data out.

Love it.. except.. you should consider including a PAUSE/RESUME button. Just sayin'. Thanks.

I wanted to send a large pdf file (20Mb).
While sending I disrupted this process (turned off pc?). As a result I had an unclosed mail in my pst-file. As a result my pst-file was corrupted and my outlook could no longer be started/opened.
This tool fixed PST-file.

Recovery Toolbox for Outlook was able to convert an .OST to .PST, but the ability to open the .PST is missing. The help text says it is under the File menu, but all that is there is "Exit".

Хорошая вещь! Отлично справляется, за секунду исправил испорченный файл.

I don't know if the files were damaged, but they could well have been. These two files were backups of PST files that I had made before transitioning from the POP mail protocol to IMAP.

IMAP attached itself to my original emails and, apparently, those stored as backups. Then all the open folders in Outlook began to disappear until there were none remaining. I had no clue what had happened. I couldn't imagine they were hijacked and held at the mercy of my ISP. Then IMAP somehow transformed my PST backup files into OST files, which Outlook 2024 cannot read.

The Toolbox was able to quickly and efficiently recreate the files as PST.
That allowed me to restore and open every one of the 24,000 files.

Later, I learned that IMAP doesn't just sync emails created after its implementation but every file that it automatically and without permission opens in Outlook. I was unaware that this caused me to exceed my storage limit, leading to the disappearance of my 24,000 emails.

It is a hazardous, intrusive, and damaging protocol. It is also a potentially lucrative source of business for your company.

Best

nice

I exported from Oulook 365 a folder with a lot of e-mails, ans had a .pst 2,28 Go file. Then, I did a factory reset of my PC. I could of course import the pst file in Outlook, but I did not wanted to do that, in order to avoid duplicates in Outlook. So, I used Toolbox recovery to convert the pst file in msg, ans I copied and paste the msg files in Outlook, and it worked perfectly.

I am using Microsoft Outlook and for some unknown reason I was unable to export my OST file to PST file.
Windows stopped working properly and I had to restore it. It went well, but I lost all the applications that were not part of Windows, such as Microsoft Office.
I reinstalled Microsoft Office but Outlook can't open the OST file. So I had to use Recovery Tollbox to convert it to a PST file.
Everything went well and I recovered my old emails and contacts.

Okay, here is the why I am so frustrated at the moment with the recovery of emails from Outlook.

Apparently, there was an upgrade to Outlook that my system allowed and the program would not load. I followed instructions on how to get it to load from MS support forum and it finally loaded however all my contacts were lost. Again, following MS support I deleted the email account and reinstalled it and that is when everything went south in a big way.

Now I had some of my contacts back (from the cloud) but none of my stored files inside Outlook. I purchased the Recovery Toolbox to retrieve those files. While running the program I could see the files being recovered in the folders and subfolders that they were originally stored in. But, when the recovery was complete the files were not in the folder and subfolder in my Outlook but in individual unsorted and ungrouped emails. That said, the folders and subfolders did come over as they were supposed to on my Iphone! Well, now Outlook determined that I am over quota on emails and will not let new emails arrive.

I deleted as many non-essential emails, files and folders that I could in Outlook so that I can receive a few emails before I have to delete some more. I AM AFRAID TO DELETE OR MOVE ANY OF THE FOLDERS AND SUBFOLDERS ON MY IPHONE FOR FEAR THAT I WILL LOSE THEM.

So, I want to get away from Outlook so downloaded em Client but when I try to allow Outlook to download my main email to the new program I get the error “there was an error obtaining credentials via oAuth”.

And that is where I am, stuck with no way to consistently receive emails on my main email address and no way to move my emails to a new program. Also, I am really afraid that I will lose all the folders and subfolders on my Iphone if I don’t get them saved to a hard drive or somewhere else.

Excelente Aplicación

Hello.

I don't know exactly what I expected, but probably more than I got.
It may well be that my emails were recreated but all emails are empty. I can see sender and recipient but that's all.
I had probably hoped that some emails could be recreated so that I could read the whole email. But no waste of money.

Kind regards
Kuno Nielsen

all perfect ! good job thanks

Çok Güzel bir program.

Excellant software

Dear Support,


Glad to tell my story here what went wrong.

I had this new e-mail account in Japan which I wanted to add to my Outlook.
I have a windows 11 laptop with the new outlook.
The e-mail account is a pop3 account, but I could not add it to my outlook.

Adding it to my Android phone worked.
Adding it to another PC with Windows 10 and the old outlook worked as well.

So I thought the new outlook was to blame here and switched it back to the old version ( there was switch button in the outlook to do so) And yes, I could add the new account ( late at night)

Next morning, starting outlook and collecting mails from several accounts worked for all but one.
For one account it suddenly wanted to know the password, but did not accept it.

Inspection of the accounts then learned that Outlook had all my E-Mail accounts converted to IMAP accounts.
(except for the Japanese account added the night before.)


This seemed to work for all account but one.
So I was stuck with this one account in IMAP which needed to be POP3 Account.

First I had to recover this E-Mail account via the Web interface putting password and security codes several times.

So I googled the Internet on how to convert IMAP to POP3 and I learned you just have to delete the IMAP account and create a new POP3.
Here is where the real trouble started....

I figured out that I need a backup, but saved then the .OST files instead of the .pst files, not knowing there is no easy way to get from .ost to .pst.

So I could set up the new account and load my E-Mails from the last weeks, but the folders I missed.

That’s where I came across your tool and could convert the .ost file.



So partially I can put the blame on Microsoft for not accepting the POP3 account in the new outlook and setting existing accounts to IMAP, Partially on me, for not saving the correct .pst file but the .ost instead.

Maybe you can do something with this information.


Kind regards,

Paul van Eden.