How to Fix Outlook Data File (.pst) cannot be accessed (Microsoft Outlook)
Quick Answer
The error 'Outlook Data File (.pst) cannot be accessed' indicates that Microsoft Outlook cannot locate or open your primary data file, preventing it from loading your emails, contacts, and calendar. The fastest fix often involves checking the file's location and permissions, or using Outlook's built-in repair tool.
What Causes This Error
- The .pst file is corrupted or damaged.
- The .pst file is located on a network drive that is currently unavailable or has connectivity issues.
- Incorrect file permissions prevent Outlook from reading or writing to the .pst file.
- The .pst file has been moved, deleted, or renamed from its expected location.
- Another program or process is currently accessing or locking the .pst file.
- Outlook profile configuration issues are preventing the correct data file from being loaded.
Step-by-Step Fixes
1Verify .pst File Location and Permissions
- Locate the .pst file: Open Outlook, go to File > Account Settings > Account Settings. Select the 'Data Files' tab. Note the full path to your .pst file. If Outlook does not open, navigate to the default location: C:\Users\<your_username>\Documents\Outlook Files\.
- Check file existence: Using File Explorer, navigate to the noted path. Confirm that the .pst file exists at this location and has not been moved or renamed.
- Check file permissions: Right-click the .pst file, select 'Properties', then go to the 'Security' tab. Ensure your user account or the 'Users' group has 'Full control' or at least 'Read & write' permissions. If not, click 'Edit' to modify permissions.
- Verify folder permissions: Navigate up one level to the folder containing the .pst file (e.g., 'Outlook Files'). Right-click the folder, select 'Properties', then 'Security'. Ensure your user account has appropriate permissions for the folder as well.
- Restart Outlook: After verifying or adjusting permissions, close and reopen Microsoft Outlook to see if the error is resolved.
2Run the Inbox Repair Tool (Scanpst.exe)
- Locate Scanpst.exe: The Inbox Repair Tool (scanpst.exe) is typically found in your Microsoft Office installation directory. For Outlook 2016/2019/365, common paths include C:\Program Files\Microsoft Office\root\Office16 or C:\Program Files (x86)\Microsoft Office\root\Office16.
- Launch Scanpst.exe: Double-click 'scanpst.exe' to open the Inbox Repair Tool. Click 'Browse' and navigate to the location of your problematic .pst file. Select the file and click 'Open'.
- Start the scan: Click 'Start' to begin the scanning process. The tool will analyze the .pst file for errors. If errors are found, you will be prompted to repair them.
- Repair the file: Check the box 'Make backup of scanned file before repairing' (recommended) and then click 'Repair'. The repair process may take some time depending on the file size and the extent of corruption.
- Open Outlook: Once the repair is complete, open Microsoft Outlook. If the repair was successful, the .pst file should now be accessible.
3Create a New Outlook Profile
- Open Control Panel: Close Outlook. Open the Windows Control Panel. Change 'View by' to 'Large icons' or 'Small icons' and find 'Mail (Microsoft Outlook)' or 'Mail (32-bit)' and open it.
- Access Mail Setup: In the Mail Setup dialog box, click 'Show Profiles...'.
- Add a new profile: Click 'Add...' to create a new profile. Give it a descriptive name (e.g., 'OutlookNewProfile') and click 'OK'.
- Configure account: Follow the on-screen prompts to set up your email account(s) within this new profile. You may need your email address, password, and server settings.
- Set as default and open Outlook: Once the account is configured, select 'Always use this profile' and choose your newly created profile from the dropdown menu. Click 'OK' and then open Outlook. If the new profile works, you can try to import the data from your old .pst file into this new profile later.
4Disable Antivirus or Firewall Temporarily
- Identify security software: Determine which antivirus or firewall software is active on your system. This information is usually available in the system tray or through Windows Security settings.
- Temporarily disable: Access the settings of your antivirus or firewall software and temporarily disable its real-time protection or file scanning features. This step should be performed with caution, and only for a short duration.
- Attempt to open Outlook: With the security software temporarily disabled, try to open Microsoft Outlook and access the .pst file. If Outlook opens without the error, the security software is likely interfering.
- Re-enable security software: Immediately re-enable your antivirus and firewall software after testing. If the issue was resolved, consult your security software's documentation for adding exceptions for Outlook and its .pst file location.
- Add exceptions: Configure your antivirus/firewall to exclude the Outlook application (outlook.exe) and the folder containing your .pst file from real-time scanning. This allows the security software to run without blocking Outlook's access.
Frequently Asked Questions
What is a .pst file?
A .pst (Personal Storage Table) file is a data file used by Microsoft Outlook to store copies of messages, calendar events, contacts, and other items on your local computer. It is primarily used with POP3 accounts or for archiving data from other account types.
Where is my .pst file usually located?
The default location for .pst files in modern versions of Outlook (2013, 2016, 2019, 365) is typically C:\Users\<your_username>\Documents\Outlook Files\. In older versions, it might be found in C:\Users\<your_username>\AppData\Local\Microsoft\Outlook.
Can I recover data from a severely corrupted .pst file?
While the Inbox Repair Tool (scanpst.exe) can fix many common corruptions, severely damaged .pst files may not be fully recoverable using built-in tools. In such cases, specialized third-party data recovery software might be an option, but success is not guaranteed.
What if I can't find scanpst.exe?
The location of scanpst.exe depends on your Office version and installation type. You can often find it by searching your C: drive for 'scanpst.exe'. Common paths include C:\Program Files\Microsoft Office\root\Office16 or C:\Program Files (x86)\Microsoft Office\root\Office16 for Outlook 2016/2019/365, or similar paths for older versions like Office15 (Outlook 2013) or Office14 (Outlook 2010).
Is it safe to delete my .pst file?
Deleting a .pst file will permanently remove all emails, contacts, calendar items, and other data stored within it. Only delete a .pst file if you are certain it is not needed, or if you have a recent backup and are intentionally creating a new data file.