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ScanPST and ScanOST Office Outlook Repair Tools

In this tutorial, I want to show how to use the Inbox Repair tool Scanpst.exe or Scanost.exe OST Integrity Check tool to recover email messages in Microsoft Outlook. Recently I had experienced an error in my Outlook mailing tool. I used first ScanPST then ScanOST tools to repair my mailbox. As a last step, I had to move my .ost file to enable exchange server to synchronize the .ost file contents which replaces corrupted local datafiles from mail server.

The error I had on my Windows 7 client PC is as follows

Microsoft Office Outlook Offline Folders
Errors have been detected in the file
C:\Users\yilmazer\AppData\Local\Outlook\outlook.ost. Quit Outlook and all mail-enabled applications, and then use the Inbox repair tool (Scanpst.exe) to diagnose and repair errors in the file. For more information about the Inbox repair tool, see Help.

use Inbox repair tool Scanpst.exe

As mentioned in the error message, I first closed Microsoft Office Outlook and mail-enabled Lync messaging application. Then I run ScanPST.exe aka Microsoft Personal Folders Scan/Repair Utility tool.
For a Microsoft Office Outlook 2007 installed on Windows 7 PC, the Scanpst.exe Outlook repair tool can be found in "C:\Program Files (x86)\Microsoft Office\Office12" folder.

When the Outlook Repair tool is executed, you can point to the outlook data .pst file for scan.

scanpst Office Outlook repair tool

For my case the damaged Outlook .pst file was located in folder "C:\users\kodyaz\AppData\Local\Microsoft\Outlook" by default for a Windows 7 installation.

scanpst

Press the Repair button to let ScanPST repair reported errors for you.

scanpst

For more on how to use Outlook Repair tool please refer to Microsoft Support knowledge base article KB287497.

An other tool to repair Outlook data files is the .ost data file scan tool named as SCANOST.EXE OST Integrity Check Tool.
Scan OST tool SCANOST.EXE is also placed in the same folder C:\Program Files (x86)\Microsoft Office\Office12 with Scanpst.exe
Before running scanost.exe you must quit Outlook. When you are ready double-click on the OST Integrity Check tool.

OST Integrity Check tool enables the user to choose specific mail folders or choose to scan all folders.

scanost

Choose the mailbox folder and mark "Repair errors". Then press "Begin Scan" button.
After OST integrity check scan and repair process is completed, below message is displayed.

scanost

At the end of the process, you will see a mail in your Deleted Items mailbox with subject "OST Integrity Check" Here is a sample OST scan result.

20:11:54 Beginning offline folder file integrity check.
20:11:54 Performing initial synchronization.
20:11:54 Synchronizer Version 12.0.6672
20:11:54 Synchronizing Mailbox 'Yilmaz, Eralper (CIT-CBTRD)'
20:11:54 Done
20:11:54 Performing integrity detection scan.
20:11:54 Scanning folder CZSK.
20:11:55 Done

Additionally you can find a log entry like below on the file folder where your .ost and .pst files located. When I checked those logs after scan tools are executed on the Outlook data files, I saw below log entries.

**Attempting to validate AMap
!!AMap page <@82805760> has csFree of 132, but should have 227
!!AMap page <@89408512> has csFree of 172, but should have 255
!!AMap page <@96773120> has csFree of 114, but should have 255
!!AMap page <@110486528> has csFree of 128, but should have 219
!!AMap page <@164070400> has csFree of 171, but should have 223
!!AMap page <@274285568> has csFree of 149, but should have 255
!!AMap page <@390341632> has csFree of 248, but should have 255
!!AMap page <@420815872> has csFree of 114, but should have 255

If ScanPST and ScanOST don't help, as a last chance, I moved the .ost file outlook.ost from its default folder C:\Users\yilmazer\AppData\Local\Microsoft\Outlook to another folder.
After data file is moved, I run Microsoft Outlook. When Outlook started to run after the .ost file is moved away (as a backup), the message folders are populated with messages from server and stored locally in a newly created .ost file which is replacing the corrupted Outlook datafile.






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