How to Fix Outlook Error 0x8004060C? [5 solutions]

Microsoft Outlook is a remarkably versatile email client. It has been around since Office 1997 and several versions have been launched. Though it is a matured and reliable software, at times, it can get glitchy and generate frustrating error messages. Since Outlook is an archiving software, trouble crops up when data migrates between versions (after update) or machines. It is doubly frustrating since Outlook also functions as a contact, calendar and scheduling manager.

Outlook does not start and you suddenly are clueless about the time and venue of a client meeting tomorrow. The most common is Outlook Error 0x8004060C. We provide a detailed step-by-step approach to Fix Outlook Error 0x8004060C.

Table of Content:

1. What is Microsoft Outlook Error 0x8004060C?
2. How to fix Outlook Error 0x8004060C?

3. Features of Stellar Repair for Outlook


What is Microsoft Outlook Error 0x8004060C?

Outlook stores data in PST files. Personal Storage Tables work with Outlook Data Files to provide you with seamless access to your email account.

Also Read: What are Outlook PST files?

The application generates Outlook Error 0x8004060C in the following cases:

1. The size of the PST file has grown very large

In the earliest Outlook versions, this was limited to 2 GB. Now, with Outlook 2010, 2013, 2016, 2019, and Microsoft 365, it is 50 GB. If the sent folder has reached maximum size Outlook Error 0x8004060C is generated. 

50 GB is not very large and a couple of years’ worth of emails and hefty attachments can easily eat up that space.

2. File corruption due to improper use

Most users do not understand that a PC takes time to work. It might be fetching new emails, writing old emails to archive, performing maintenance tasks, etc.

That is why PC shutdowns must be through the operating system power button and not the hard button on the laptop and desktop. A shutdown through the OS prevents damage. A hard shutdown (or restart) is the most prominent reason for file corruption.

Also Read: Step by Step Guide to Repair PST Files in Outlook?

3. Malware attacks on Outlook

Outlook files remain the favourite of hackers. They contain personal information, calendar, and contacts and are a gold mine of data. If you are not using a genuine operating system but a cracked version, you will not receive regular security patches. These security patches not only protect OS against intrusions but also beef up the antivirus and firewall.

To add to the risk, it is common to use untrustworthy USB drives from others. Autoplay of USB drives is a major security problem.

How to fix Outlook Error 0x8004060C?

1. Delete unnecessary items- fix Outlook Error 0x8004060C

To make the PST file smaller, open Outlook and delete unwanted emails. From time to time, you should delete unimportant emails and create space. Also, clear the trash folder. The archiving of emails on your PC takes up space. That is why the size is limited to 50 GB. Ensure that the size never goes above 45 GB to be safe.

Also Read: How to fix Outlook Error “Not Implemented”

2. Increase the Outlook PST File Size Limit

To do this, you have to tinker with the registry.

Note: to create a new registry value, we navigate to the location, right-click, and create the type of registry entry we want (DWORD, QWORD, Binary Value, etc.). We can name the entry and right-click on it to modify the parameters.

First, you have to back up the registry.

In the Search bar type regedit.exe and hit Enter

fix Outlook Error 0x8004060C

To save a copy of the registry

Right click and Run as administrator

File > Export

File Export

Choose a location and give a name to the file and save it


Click on and expand HKEY_CURRENT_USER

 Fix Outlook Error 0x8004060C

Go to Software > Policies > Microsoft > Office

 Fix Outlook Error 0x8004060C

Expand the following registry key

For Outlook 2016


For Outlook 2013


For Outlook 2010


For Outlook 2007


For Outlook 2003



Locate and expand PST. In the empty space in the right pane, right-click and select New > DWord (32 bit) Value

Locate and expand PST

Enter the name as “MaxLargeFileSize”


Right-click on this new DWORD > Modify > Set value (as you wish, say 75000) and click on Decimal, and exit by clicking Okay


Create a new DWord (32-bit) Value

Enter the name “WarnLargeFileSize”

Warn Large File Size

Again right click > Modify > Set 90% value (say 67500) and click on Decimal and exit by clicking Okay

click on Decimal

Now your PST file is set to 75000 MB or 73.2 GB.

You can increase PST size in this way.

Also Read: Outlook PST File Not Found: 3 Solutions

3. Compact the PST file- fix Outlook Error 0x8004060C

Open Outlook

File > Info > Account Settings and select Account Settings

fix Outlook Error 0x8004060C

Click on Data

Select PST file

Now select Settings > Advanced > click on Outlook Data File Settings.

fix Outlook Error 0x8004060C

Click Compact Now and click Okay

4. Replace Cached with Online Mode

  • Open Outlook and click File
  • Navigate to Account Settings > Account Settings
  • Click Email and select the account
  • Click Change
  • In Microsoft Exchange Account Settings, click on More Settings
  • Click Advanced
  • Remove the check mark from the Cached Exchange Mode
  • Click Okay

fix Outlook Error 0x8004060C

  • Close and reopen Outlook for change to take effect.

Also Read: How To Fix Outlook MAPI32.DLL Error [SOLVED]

5. Use Stellar Repair for Outlook

You can tinker endlessly with the registry or try to compact the Outlook PST file.

But problems with Outlook Error 0x8004060C are often persistent.

Stellar Repair for Outlook is a fantastic tool that solves every problem related to Outlook and PST files.

Features of Stellar Repair for Outlook

  • Repairs Outlook PST files flawlessly. No fear of partial deletion of emails.
  • Retrieves emails, contacts, calendar, and settings.
  • Can export the data to Microsoft 365.
  • Stellar Repair for Outlook can repair password-protected Outlook PST files.
  • Can export the data in a multitude of formats besides PST – HTML, MSG, RBOX, RTF, and more.
  • Splits and compacts large PST files.
  • Stellar Repair for Outlook is available for Windows 7, 8, 8.1, 10, and 11 in both 32-bit and 64-bit versions.

We provide a free-of-cost evaluation version. Download the tool and install it.

free windows download

It will scan the Outlook folder and offer a complete preview of the contents.

Through the software, you can buy a licence (or you can buy it from the website) and extract as many emails as you want.

Also Read: How to get Activation Key for Stellar Outlook Repair?

Download and install Stellar Repair for Outlook

Click on Browse and select the folder and PST file

PST file

Click Repair and wait for the process to run its course

Click Repair

Now you have a preview of what you want to save

Save the repaired file in the format you want

Save the repaired File

It’s simple, and the user needs no technical knowledge. The UI offers guidance and in case you have any questions our customer care team is always ready to help.

Also Read: How to Fix Outlook Error Code ‍0x80070021?

To Sum It All Up

Fix Outlook Error 0x8004060C is quite common. But you can’t function without access to emails. The quickest solution with no fear of damaging PST files is to use the Stellar Repair for Outlook tool. You can fix the problem in a matter of a few minutes and restore your emails with a 100% success rate.

Also Read: How to Fix Outlook Error 0x80040610 in Windows?

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