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How to restore OST Mailbox in Outlook ?

Microsoft Outlook is widely used for managing various types of information like e-mail, messages, contact info, schedule, notes etc. The stored data can be retrieved via the OST Mailbox while outlook is offline. The OST file is same as PST file but only difference is it stores data for offline viewing. Sometimes due to various faults, the OST file gets corrupted or damaged and stops the user to access information from OST file. If your office or home networks are using Microsoft exchange server then probably therewould be an OST file in outlook for managing offline information. To overcome OST issues, you need to reset OST in outlook. If you don’t know how to restore OST Mailbox in Outlook then don’t get so worried and apply the following tricks :

How to reset OST in Outlook ?

  1. Start outlook in safe mode or offline mode and click Connect to attach with new Exchange database.
  2. Go to Tools > E-mail Accounts > View or change existing e-mail account and click Next.
  3. Now, click Microsoft Exchange server account and then click Change.
  4. Click More Settings > Advanced and clear the Use Cached Exchange Mode check box and then click Apply.
  5. You will get a message as "You must restart Outlook for these changes to take effect". Don't exit Outlook here.
  6. Now click on Offline Folder File Settings and then click Disable Offline Use.
  7. You will get a message asking you continue or not. Click yes to continue then OK, Next and Finish.
  8. Restart Outlook.

After restarting outlook apply 1 to 3 steps again and go to More settings > Advanced and check the Use Cached Exchange Mode check box and click Offline folder settings and change the existing OST file name as outlook.ost to outlook1.ost and click OK. A prompt will be appeared asking you “The file filename could not be found. Would you like to create it?” click Yes, then OK, Next and Finish and Exit E-mail account wizard. Now exit and restart outlook.

Congratulations!! You have successfully restored OST Mailbox in Outlook and when you will restart outlook all the data will be automatically copied in the newly created OST file. After completing these tasks if still you are getting same problem then it means there is another major corruption in mailbox like there might be corrupted or suspicious e-mails or too large e-mail file in PST. In this situation you also need to fix PST problem using scanpst.exe tool that resides in local computer in program files. If this tool doesn’t work then use another effective third party tool to repair PST and OST problem. In my recommendation the PST Repair Tool will be the best in this situation. It not only repairs PST and OST file but also finds the critical spot in outlook and fix them to work outlook properly. It is easy to use and fixes almost all the outlook problem in seconds.

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