Hello,

No, "scanpst.exe (Inbox Repair Tool)" does not compact the PST File. SCANPST checks the file directory structure and file headers (low level objects) for corruptions and tries to repair the file. But it does not repair highly corrupted Outlook PST Files. On the other hand,Compact Now" feature that is inbuilt in Microsoft Outlook reduces only white spaces and it can work or compact only healthy Outlook PST File. So, you should run SCANPST again (if you are thinking to do so) and can import PST File into Outlook (after compressing the data file). If the PST File still remains corrupted, then you need to move on any third party utility. I had the same problem in the past, but my friend suggests me a reliable & efficient PST Repair Tool. When I used its demo version, it really worked great. So I would like to suggest you this tool on behalf of my personal experience.

Thanks  & Regards

Kelvin Howard

• Edited by Kelvin Howard 1 hour 39 minutes ago

hello ,

your problem will not going to solved using outlook inbuilt utility scanpst.exe as it can only handle minor corruption issue and you may face data loss because of deletion of bad header files. I suggest you to use Synchronization filter method  to reduce the size of PST file and then follow compact Now this will surely reduce the size at some extent. To know more about the procedure refer this: https://support.microsoft.com/en-us/kb/932086

Regards.

Hi,

I think Kelvin has explained things pretty well.

I have one more thing to suggest in your scenario, that is please don't keep too much in a single .pst file. I've seen large .pst files that cause Outlook to perform quite slow. So "a year at a time" is a good choice to keep the .pst files in a proper size.

Regards,

Melon Chen
TechNet Community Su

NO, scanpst.exe never do such compact or compress operations, if you are unable then using third party tool you can repair and then compact or split your large pst file to smaller pst file.

For the recovery of Outlook pst file use Kernel for Outlook PST Repair Tool from http://www.nucleustechnologies.com/Microsoft-Outlook-Mail-Recovery.html

Hello,

No, "scanpst.exe (Inbox Repair Tool)" does not compact the PST File. SCANPST checks the file directory structure and file headers (low level objects) for corruptions and tries to repair the file. But it does not repair highly corrupted Outlook PST Files. On the other hand,Compact Now" feature that is inbuilt in Microsoft Outlook reduces only white spaces and it can work or compact only healthy Outlook PST File. So, you should run SCANPST again (if you are thinking to do so) and can import PST File into Outlook (after compressing the data file). If the PST File still remains corrupted, then you need to move on any third party utility. I had the same problem in the past, but my friend suggests me a reliable & efficient PST Repair Tool. When I used its demo version, it really worked great. So I would like to suggest you this tool on behalf of my personal experience.

Thanks  & Regards

Kelvin Howard

• Edited by Kelvin Howard Thursday, May 14, 2015 5:50 AM

Hello,

No, "scanpst.exe (Inbox Repair Tool)" does not compact the PST File. SCANPST checks the file directory structure and file headers (low level objects) for corruptions and tries to repair the file. But it does not repair highly corrupted Outlook PST Files. On the other hand,Compact Now" feature that is inbuilt in Microsoft Outlook reduces only white spaces and it can work or compact only healthy Outlook PST File. So, you should run SCANPST again (if you are thinking to do so) and can import PST File into Outlook (after compressing the data file). If the PST File still remains corrupted, then you need to move on any third party utility. I had the same problem in the past, but my friend suggests me a reliable & efficient PST Repair Tool. When I used its demo version, it really worked great. So I would like to suggest you this tool on behalf of my personal experience.

Thanks  & Regards

Kelvin Howard

• Edited by Kelvin Howard Thursday, May 14, 2015 5:50 AM

Hello,

No, "scanpst.exe (Inbox Repair Tool)" does not compact the PST File. SCANPST checks the file directory structure and file headers (low level objects) for corruptions and tries to repair the file. But it does not repair highly corrupted Outlook PST Files. On the other hand,Compact Now" feature that is inbuilt in Microsoft Outlook reduces only white spaces and it can work or compact only healthy Outlook PST File. So, you should run SCANPST again (if you are thinking to do so) and can import PST File into Outlook (after compressing the data file). If the PST File still remains corrupted, then you need to move on any third party utility. I had the same problem in the past, but my friend suggests me a reliable & efficient PST Repair Tool. When I used its demo version, it really worked great. So I would like to suggest you this tool on behalf of my personal experience.

Thanks  & Regards

Kelvin Howard

• Edited by Kelvin Howard Thursday, May 14, 2015 5:50 AM
• Proposed as answer by Melon Chen CHNMicrosoft contingent staff, Moderator 6 hours 3 minutes ago

Hello,

No, "scanpst.exe (Inbox Repair Tool)" does not compact the PST File. SCANPST checks the file directory structure and file headers (low level objects) for corruptions and tries to repair the file. But it does not repair highly corrupted Outlook PST Files. On the other hand,Compact Now" feature that is inbuilt in Microsoft Outlook reduces only white spaces and it can work or compact only healthy Outlook PST File. So, you should run SCANPST again (if you are thinking to do so) and can import PST File into Outlook (after compressing the data file). If the PST File still remains corrupted, then you need to move on any third party utility. I had the same problem in the past, but my friend suggests me a reliable & efficient PST Repair Tool. When I used its demo version, it really worked great. So I would like to suggest you this tool on behalf of my personal experience.

Thanks  & Regards

Kelvin Howard

• Edited by Kelvin Howard Thursday, May 14, 2015 5:50 AM
• Proposed as answer by Melon Chen CHNMicrosoft contingent staff, Moderator Tuesday, May 19, 2015 1:25 AM
• Marked as answer by Melon Chen CHNMicrosoft contingent staff, Moderator Thursday, May 21, 2015 2:29 AM

hello,

If the method that i have suggested above is not working for you or your pst file got severely damaged, than there is only one way to get overcome with this situation is to use Recover outlook software. I found this software is more efficient and reliable for repairing corrupt PST file. This software also reduce the size of large pst file significantly.

Regards.

Please try PST Repair Kit. A remarkably efficient Microsoft Outlook PST file repair tool that combines an intuitive UI and a uniquely capable core. The software a must-have for anyone who wants to know how to repair PST file in Outlook without sharing data with third parties and spending a fortune on their services.

For more: http://www.outlookpst.repair/

• Marked as answer by BlaiseMar 17 hours 38 minutes ago

Please try PST Repair Kit. A remarkably efficient Microsoft Outlook PST file repair tool that combines an intuitive UI and a uniquely capable core. The software a must-have for anyone who wants to know how to repair PST file in Outlook without sharing data with third parties and spending a fortune on their services.

For more: http://www.outlookpst.repair/

• Marked as answer by BlaiseMar Saturday, May 30, 2015 1:49 PM