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on December 18, 2025
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Then, in the next window, make sure 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 Outlook sync help from FixTechGuide to OneDrive.
Open Outlook in safe mode and disable add-ins
Before joining Secure Data, he worked as a freelance technical writer. If you moved your data file or its location changed somehow, Outlook might not be able to find it. I am transferring all my files from a Windows 10 PC to a new Windows 11 PC and am having issues moving my Outlook .PST files for POP accounts.
This is a good solution if you think your data file might be corrupted.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.If your email server supports both IMAP and POP3, auto account setup will create an IMAP account by default.Whenever Outlook cannot access an OST file, I usually disable any firewall or get rid of unwanted plugins.To do this, you can take the assistance of Stellar OST to PST converter.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.It can also allow saving the recovered PST data to other file formats, like MSG, EML, HTML, RTF, and PDF.
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 expert Outlook tips By FixTechGuide 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
If repairing the file doesn’t solve the issue, you can try creating a new Outlook profile and adding your existing file to it. This could help if you’re dealing with configuration issues but the file itself reset cached Exchange mode is okay. Once you have found the Outlook.exe file, right-click, and go to its properties. After getting the Properties window, just go to the "Compatibility" tab and make sure the "Run this program in Compatibility Mode" option is disabled.
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.
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.
Then, in the next window, make sure 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 Outlook sync help from FixTechGuide to OneDrive.
Open Outlook in safe mode and disable add-ins
Before joining Secure Data, he worked as a freelance technical writer. If you moved your data file or its location changed somehow, Outlook might not be able to find it. I am transferring all my files from a Windows 10 PC to a new Windows 11 PC and am having issues moving my Outlook .PST files for POP accounts.
This is a good solution if you think your data file might be corrupted.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.If your email server supports both IMAP and POP3, auto account setup will create an IMAP account by default.Whenever Outlook cannot access an OST file, I usually disable any firewall or get rid of unwanted plugins.To do this, you can take the assistance of Stellar OST to PST converter.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.It can also allow saving the recovered PST data to other file formats, like MSG, EML, HTML, RTF, and PDF.
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 expert Outlook tips By FixTechGuide 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
If repairing the file doesn’t solve the issue, you can try creating a new Outlook profile and adding your existing file to it. This could help if you’re dealing with configuration issues but the file itself reset cached Exchange mode is okay. Once you have found the Outlook.exe file, right-click, and go to its properties. After getting the Properties window, just go to the "Compatibility" tab and make sure the "Run this program in Compatibility Mode" option is disabled.
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.
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.