Resolving the 'Outlook OST Cannot Be Opened' Error: Fixing Email Access Issues

Encountering the "Outlook OST cannot be opened" error in Microsoft Outlook can be frustrating, but it's fixable. Here's how to resolve it:

  1. Close Outlook: Ensure Outlook is completely closed before proceeding.
  2. OST Integrity Check: Use the built-in "OST Integrity Check" tool (Scanpst.exe) to repair the OST file. Locate the tool on your system, run it, and select your OST file for scanning and repair.
  3. Create a New OST: If the error persists, create a new OST file. Go to Outlook's Account Settings, disable Cached Exchange Mode, and then enable it again to recreate the OST file.
  4. Check Exchange Server: Verify the health of your Exchange Server, as server issues can also trigger this error.
By following these steps, you can typically resolve the "Outlook OST cannot be opened" error and regain access to your email data.

Repairing OST (Outlook Offline Storage Table) files is vital when email communication is disrupted due to corruption. ATS OST to PST Recovery offers the simplest and most efficient way to recover your OST files. Here's how it works:
  1. Download and Install: Start by downloading and installing ATS OST Recovery on your system.
  2. Select Your OST File: Launch the software and choose the corrupted OST file you want to repair.
  3. Repair: Click the "Repair" button, and ATS OST Recovery will begin the scanning and repair process automatically.
  4. Preview and Save: After repair, you can preview the recovered data and save it to a usable PST file.
More Info: Free Unlimited OST to PST Converter