Are you constantly seeing the error “Outlook data file cannot be accessed” or “sending reported error 0x8004010f” while using Microsoft Outlook? This frustrating error is common for many Outlook users and can appear in several ways such as:
Outlook 0x8004010f
0x8004010f Outlook data file cannot be accessed
Fehler 0x8004010f (German)
Erreur 0x8004010f (French)
Regardless of the language or Outlook version you use, this error disrupts the sending or receiving of emails and can make your Outlook unusable. Let’s fix that.
This comprehensive guide provides 8 practical solutions to fix Outlook error 0x8004010f, ensure your Outlook data file can be accessed, and get your mailbox back in working condition.
This error usually occurs when Outlook cannot access the default data file (PST or OST). It may be due to:
Corrupted Outlook profile
Damaged Outlook data file
Improper Outlook configuration
Network or sync errors
Cached Exchange mode issues
Now, let’s go through 8 solutions to resolve the “Outlook data file cannot be opened” or “0x8004010f Outlook” error.
Most commonly, error 0x8004010f occurs because the Outlook profile is corrupted or outdated. Creating a new profile allows Outlook to start fresh and bypass any broken links to the data file.
Open Control Panel and click Mail (Microsoft Outlook).
Click on Show Profiles.
Click Add and enter a name for the new profile.
Follow the on-screen instructions to set up your email account.
Once done, select Always use this profile and choose your newly created profile from the list.
Click OK and restart Outlook.
This often fixes sending reported error Outlook data file cannot be accessed issues instantly.
If Outlook is pointing to a removed or moved data file, it will throw “Outlook data file cannot be accessed” or “Outlook 0x8004010f”. Reassigning the correct default data file usually resolves the error.
Go to Control Panel > Mail > Data Files.
Select your correct email account and click Set as Default.
If the current data file is invalid or missing, click Add and choose an existing PST or create a new one.
Click OK, then restart Outlook.
This can fix 0x8004010f Outlook data file cannot be accessed problems due to misconfigured data files.
Cached Exchange Mode can cause synchronization problems with the server, leading to file access errors. Disabling it forces Outlook to connect directly to the server, avoiding cache-related corruption.
Open Outlook and go to File > Account Settings > Account Settings.
Select your Exchange account and click Change.
Uncheck Use Cached Exchange Mode.
Click Next > Finish, then restart Outlook.
This method is particularly effective if your Outlook data file cannot be opened or you’re experiencing frequent sync issues.
If the Outlook data file is corrupt, it might throw “Sending reported error 0x8004010f”. Microsoft provides an Inbox Repair Tool that can scan and fix minor issues in PST or OST files.
Close Outlook completely.
Navigate to the following directory depending on your Office version:
Office 2016: C:\Program Files (x86)\Microsoft Office\root\Office16\
Office 2013: C:\Program Files (x86)\Microsoft Office\Office15\
Find and run SCANPST.EXE.
Browse and select your .pst file.
Click Start, then Repair.
After the process, reopen Outlook and see if the file access error is resolved.
If you’re using an Exchange, IMAP, or Outlook.com account, the OST file might be damaged, leading to 0x8004010f. Deleting and letting Outlook rebuild the OST can fix the issue.
Close Outlook.
Go to the OST file location:
C:\Users\YourUsername\AppData\Local\Microsoft\Outlook\
Locate your .ost file and rename or delete it.
Reopen Outlook. It will automatically recreate the file.
This is a good fix for issues like Outlook data file cannot be accessed or Outlook sending error 0x8004010f.
Using an outdated or buggy version of Outlook can lead to errors like erreur 0x8004010f or Fehler 0x8004010f. Ensure you’re running the latest version or repair Outlook to fix underlying software problems.
Go to File > Office Account > Update Options > Update Now in Outlook.
To repair, go to Control Panel > Programs > Programs and Features.
Find Microsoft Office, right-click it, and select Change.
Choose Quick Repair, and if that doesn’t work, try Online Repair.
This should correct sending reported error Outlook data file cannot be accessed due to program-level issues.
Security software may block Outlook from accessing data files, resulting in Outlook data file cannot be accessed or Outlook 0x8004010f errors. Temporarily disabling antivirus can help isolate this cause.
Temporarily disable your firewall or antivirus software.
Launch Outlook and check if the error persists.
If Outlook works correctly, whitelist Outlook in your antivirus or firewall settings.
Re-enable your security software.
This solution works especially well when Outlook suddenly stops working after a security update.
Microsoft’s Support and Recovery Assistant (SaRA) is a free tool that can automatically diagnose and fix many Outlook problems, including error 0x8004010f and data file access issues.
Download SaRA from Microsoft’s official website.
Run the tool and select Outlook > I am having problems sending or receiving email.
Let the tool analyze your system and follow the recommended fixes.
SaRA is ideal if you want a one-click solution to troubleshoot Outlook errors without going too technical.
The 0x8004010f Outlook error is one of the most frustrating issues because it disrupts communication and email flow. Whether you’re getting “sending reported error 0x8004010f”, seeing “Outlook data file cannot be opened”, or getting variations in different languages like erreur 0x8004010f or Fehler 0x8004010f, these solutions offer a reliable way to resolve the issue.
Start with the simple fixes like creating a new Outlook profile or setting the correct data file, and if necessary, move on to repairing or rebuilding the Outlook data files. Tools like SCANPST or Microsoft SaRA can greatly help if the problem persists. Once fixed, you’ll have a stable and reliable Outlook experience once again.
A: It’s a common error that occurs when Outlook can’t access the default data file (PST or OST). It prevents sending or receiving emails.
A: Try creating a new Outlook profile, repairing your data file with ScanPST, or resetting the default data file location.
A: Yes, some antivirus software may block access to Outlook files. Try disabling it temporarily to test.
A: Yes. Outlook will rebuild the OST file automatically when restarted, but only do this for Exchange or IMAP accounts.
A: Microsoft’s Support and Recovery Assistant (SaRA) is a reliable tool for automatically fixing Outlook problems like 0x8004010f.
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