Repairing Outlook OST File Error

“Hi all, I have a problem while opening my Outlook OST file. I am getting an error ‘cannot open our default email folders. The file filename.ost is not an offline folder file’. I have some very important work with my OST file; please help me fix this error on .OST file and get back access to it. Thanks in advance...”

Sometimes you need to use Outlook in offline mode; then OST file serves you purpose. You may come across situation like above while trying to open Outlook OST file. Error message in this case might have displayed due to Outlook OST file corruption or due to synchronization problem. You can solve the synchronization problem easily by following some guidelines given in Outlook support pages or by referring to any info provided on internet. But OST file might also get corrupted due to various reasons as given below:

  • OST file becomes inaccessible and display error messages when infected by virus , malware or spyware threats
  • Abrupt system shutdown or incorrectly terminating Outlook application can affect working of OST file that might show errors upon trying to open it
  • OST file may get damaged and show errors when OST file exceeds its fixed file size limit; due to incorrect way of importing or compressing OST file
  • Interruption while synchronizing OST file with Microsoft Exchange Server can make OST file exhibit error warnings when tried to access its data

When Outlook OST file is corrupted for any of the above reason, then you may see following error messages on your computer screen:

  • “Unable to expand the folder. The set of folders could not be opened. Errors could have been detected in the file xxxx.ost. Quit all mail-enabled applications, and then use the Inbox Repair Tool”
  • Oversized OST file problem (OST file size reaches or exceeds the 2GB limit).
  • Outlook 2010 Errors have been detected in the OST. Scanpst crashes
  • Outlook data file access is denied OST or Cannot open particular Outlook items when offline, etc.

You may get many errors while synchronizing OST file with server; when trying to open any item on Outlook offline profile and in other situations. Exit the OST file and run ScanOST.exe which is the OST integrity check tool located at: “drive:\Program Files\Microsoft Office\OFFICE12” on your PC.

After running ScanOST.exe, you could be able to use OST file normally. If you are still getting the error message, then there is an alternate solution. OST file errors can be fixed using suitable OST file repair software like Yodot OST to PST Converter, which has capability to fix convert the corrupt or inaccessible OST file to PST in a couple of clicks.

Yodot OST to PST Converter - Software to Convert Erroneous OST to PST File

Yodot OST to PST Converter software converts the corrupt or inaccessible OST file to a healthy PST file in a couple of clicks. The tool converts OST to a PST file along with all it's contents like emails, contacts, RSS feeds, tasks, notes, and other attributes to a healthy PST file. Meanwhile, the tool is available in free demo edition, which is available for free download. The demo edition converts the corrupt OST to a healthy PST file and allows a free preview of the converted file, and all it's contents, thereby allows users to evaluate the tool prior activating the complete version. So, one can freely download the software and conv ert their damaged OST file to a healthy accesible PST file in three easy steps. The complete procedure to fix errors in OST file, or convert OST to a PST file is given below:

Steps to convert erroneous OST file to a PST:

  • Download Yodot OST to PST Converter utility and install it to Windows PC
  • Setup the software and follow the provided on screen instructions
  • From main window you will find two options, "Open OST File” and “Find OST File”
  • Choose "Open OST File" option to select corrupted Outlook 2010 OST file. If you are don’t where Outlook 2010 OST file is located, then click on “Find OST File” option to locate corrupt OST file
  • Next, browse for the target path to save converted OST file
  • Subsequently, click on “Convert” button to initiate OST file conversion process
  • After completion of conversion, this software gives a notification stating that “OST file conversion completed”

Helpful Tips:

  • Use powerful antivirus software on your computer to avoid OST file corruption
  • Keep backup OST file regularly on your PC which could be used in emergencies like OST file corruption