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on December 30, 2025
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By default, the Outlook data file resides in your local user's "Documents" folder. In the Folder Pane, you might see a folder named Recovered Personal Folders that contains your default Outlook folders or a Lost and Found folder. Although the repair process might recreate some of the folders, they may reset cached Exchange mode be empty.
Open Outlook in safe mode and disable add-ins
You can directly go to its location or look for it from the search option on the taskbar. Let’s learn how to fix the Outlook data file that cannot be accessed by implementing the following solutions. If your email server supports both IMAP and POP3, auto account setup will create an IMAP account by default. You will need to follow the manual steps in order to create a POP3 account. However, if your email server supports ONLY a POP3, auto account setup will create a POP3 account.
Our Outlook Express file repair software is designed to help you repair your files and recover your data, so you don’t lose access to anything you need.Before you change any settings or troubleshoot further, use these steps to check your connectivity and settings, and try restarting Outlook and your computer.If you can open the original Outlook Data File, you might be able to recover additional items.In this case, you can simply run a Windows troubleshooter to fix the installed Outlook application.You can create a new Outlook Data File and drag the items in the Lost and Found folder into the new data file.
Part 2: Common Accessibility Errors with Outlook
Before you change any settings or troubleshoot further, use these steps to check your connectivity and settings, and try restarting Outlook and your computer. When you want to replicate a copy on the cloud, manually copy the PST in the OneDrive folder. This will result in one copy in the folder in OneDrive being used for backup purposes, and another copy in your Outlook client that can be kept open Microsoft Outlook Email Repair Tool Online by Outlook.
Repair Outlook Data Files (.pst and .ost)
Afterward, you can try to relaunch the Outlook application and access the saved OST file without any trouble. If this diagnostic step works and fixes the error, disabling your add-ins should help prevent it from happening again. If you think a third-party add-in might be causing the error, try starting Outlook in Safe mode without any add-ins or extensions loaded to see if it works. Creating new Outlook profile or rebooting the computer fixes the issue. I tried to manually access the OST file location and I could read the file just fine.
Step 2 - Create a new Outlook profile
Simply launch the Stellar OST to PST Converter and load the corrupt OST file on it. Afterward, you can start the conversion process that would export all the data in a PST format without any complications. In the end, you can preview your data, export the PST file, and open it in any other application like Thunderbird, Mail Spring, Mail Bird, and so on. As it will list options to reset or repair MS Office, you can click on the "Repair" how to fix Outlook not opening today option. This will open a new wizard that you can follow to perform a quick or online repairing of the installed Office applications. The issue I got caught on relates to the required steps in Outlook to switch files.
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I’m sure that after reading this post, you would be able to resolve the Outlook data file cannot be accessed issue. Whenever Outlook cannot access an OST file, I usually disable any firewall or get rid of unwanted plugins. Besides that, if you also cannot access OST files in Outlook, then you can try to repair it or simply convert it to a PST format. In this way, you can access your data on Outlook or any other email provider easily. At times, the Outlook data file cannot be accessed issue is caused by syncing errors between Exchange and Outlook. To overcome this, you can just turn off the cached mode in MS Exchange.
Error 0x8004010F when you try to send or receive email in Outlook 2010 or Outlook 2013
That is almost definitely the problem and it's very common unfortunately. You need to configure your OneDrive to not back up the directory where your Outlook data file resides. It is not possible for Outlook and OneDrive to both try to access the data file at the same time. By default, the Outlook data file resides in your local user's \"Documents\" folder. So you'll want to make sure OneDrive is not syncing that folder.