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on January 13, 2026
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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" 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. It is also important to have a look at some of the common accessibility issues encountered in Outlook and avoid this problem from happening again. Lastly, if you cannot access an OST file in Outlook, then you can try to export it to any other application instead.
Step 6: Repair the Corrupted Outlook Data File (PST)
I tried to manually access the OST file location and I could read the file just fine. 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 by Outlook.
On the righthand side of the window, choose the button to \"manage backup\". In that window, ensure the \"Documents\" folder is not enabled to sync to OneDrive. Then, in the next window, make sure troubleshoot Outlook synchronizing folders error you're on the tab marked "Sync and backup". On the righthand side of the window, choose the button to "manage backup". In that window, ensure the "Documents" folder is not enabled to sync to OneDrive.
When you want to replicate a copy on the cloud, manually copy the PST in the OneDrive folder.And though an error message might look worrying, you may be able to fix the problem.Though, if Outlook cannot access the OST file or if it has been corrupted, then you can encounter unwanted problems.To make sure this is not the case, try opening Outlook and see if it found the data file.On the righthand side of the window, choose the button to \"manage backup\".This will open a new wizard that you can follow to perform a quick or online repairing of the installed Office applications.Read on to know the likely causes behind the 0x F error in Outlook and the solutions to fix it.
Error 0x8004010F when you try to send or receive email in Outlook 2010 or Outlook 2013
How your data is synched also depends on the type of account you have. POP accounts store information directly on your computer in Outlook .pst files. On the other hand, accounts through Office 365, Exchange Server, Outlook.com, and IMAP store information offline in Outlook data files (.ost files). It never feels great to run into an error message, especially if you’re in the middle of an important task. If you’re experiencing the "Outlook data file cannot be accessed" error and can’t find the fix, SecureData has you covered.
Fixing 'Outlook Data File Cannot Be Accessed' Error on PC
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. By default, the Outlook data file resides in your local user's "Documents" folder.
How to fix Outlook Data File cannot be accessed on Windows 11?
This could happen if, for example, OneDrive backs up your Documents folder to the cloud and includes the Outlook Files folder where the file is located. During the syncing process, OneDrive locks the file, which prevents Outlook from accessing it, resulting in the "Outlook data file cannot be opened" error. This is a good solution if you think your data file might be corrupted. Another reason for the Outlook data file cannot be accessed issue can be related to a corrupt application. In this case, you can simply run a Windows troubleshooter to fix the installed Outlook application. When you restart Outlook, all the temporary files are removed and related processes and services are automatically cleared.
Step 1 - Locate the default Outlook data file
Sadly, if the mode has been enabled, then it can cause issues with the accessibility of the saved OST file. If you can open the original Outlook Data File, you might be able to recover additional items. The Inbox Repair tool creates a backup file with the same name as the original, but with a .bak extension, and saves it in the same folder. There may be items in the backup file that you might be able to recover that the Inbox Repair tool couldn't. Therefore, if you cannot access an repair PST file without data loss OST file in Outlook, then you can browse to the location of the Outlook.exe file.
Though, if Outlook cannot access the OST file or if it has been corrupted, then you can encounter unwanted problems. In this post, I will let you know what to do if the Outlook data file cannot be accessed on your system. It can recover all the mailbox items from resolve Outlook not sending emails fast the corrupted file and save them to a new PST file, which you can import into your Outlook profile. It can also allow saving the recovered PST data to other file formats, like MSG, EML, HTML, RTF, and PDF. It even comes with features like auto-split to split large PST files and export the PST contents directly to Microsoft 365. You can create a new Outlook Data File and drag the items in the Lost and Found folder into the new data file.
After getting the Properties window, just go to the "Compatibility" tab and make sure the "Run this program in Compatibility Mode" option is disabled. You may need to move the Outlook data file back down from OneDrive. Sometimes, rather than keeping a backup it actually takes the files off your system and moves them up to the cloud.