Microsoft Office Outlook An Unexpected Error Has Occurred

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No doubt, encountering errors in Outlook is maddening as work completely gets disturbed. Indeed, you are just left looking for effective methods to resolve the error message. One common error that users experienced in Outlook are 0x8000ffff. If you're wondering what could be a possible reason to encounter such an annoying Outlook error, then you're in the right place. In this post, we're going to walk you through the causes and how to resolve Microsoft's outlook an unknown error occurred 0x8000ffff effectively.

  1. Microsoft Outlook An Unexpected Error Has Occurred
  2. Microsoft Office Outlook An Unexpected Error Has Occurred Now
  3. Microsoft Office Outlook An Unexpected Error Has Occurred Today
Microsoft office outlook an unexpected error has occurred due

As we all know Microsoft has released a free Customer Preview build of its upcoming Office suite “ Office 2013 ” to public. I was using Microsoft Office 2010 in Windows 7 and I decided to test this new version of Office. So I uninstalled Office 2010 and also uninstalled Outlook Hotmail Connector which is used to access Hotmail account in. First, launch Microsoft Outlook. On the taskbar, click the File tab Options Add-ins. Click COM Add-ins in the Manage box, and then click Go. Clear the checkboxes shown next to the 3rd party add-ins which you want to disable. Now restart Microsoft Outlook.

In this article

Microsoft Office Outlook An Unexpected Error Has Occurred
01Causes of An Unknown Error Occurred 0x8000ffff in Outlook
03Important Notice Before Partitioning A Hard Drive

Causes of An Unknown Error Occurred 0x8000ffff in Outlook

You would encounter this Outlook unknown error 0x8000ffff while adding a data or PST file in the Mail applet. It is quite a common error experienced by many Outlook users. If you're wondering what could be the culprit behind facing such annoying errors, then it may be one of the followings:

System File Corruption

The first one could be system file corruption. The Outlook unknown error occurred 0x8000ffff may be caused due to system file corruption and damage in system files. Therefore, it is important to take quick steps to resolve the system file damage/corruption to prevent your data from being corrupted or lost.

Blue Screen

In most severe cases, the Blue Screen/Blue Screen of Death could be a culprit. Blue Screen is commonly known as a stop error screen or bug check screen. It emerges only in scenarios of fatal system error or being shown by the Microsoft Windows family of OS when a critical error is identified. Also, the Blue Screen may appear due to driver malfunction or hardware failure.

DLL Error

You may encounter Microsoft Outlook an unknown error occurred 0x8000ffff because of the missing DDL (Dynamic Link Library). DLL is considered an essential part of any program or application. In scenarios of a missing DDL, the application or program will not work as expected.

Application Freeze

Sudden and often Outlook freeze could be an alarming indication that there is something wrong with it. In such scenarios, the application doesn't let you perform any workaround because it shuts down abnormally when you try to perform any task. It could also be the case that the Windows screen begins freeing because of the overutilization of system resources by other programs.

No matter what cause is, continue reading to fix Outlook an unknown error occurred 0x8000fff.

How to resolve Outlook Error 0x8000ffff?

The following are the recommend workarounds to fix the Microsoft Outlook an unknown error occurred 0x8000ffff without much hassle.

1 Add the data file in Account Settings

If you encounter this error while adding a data file in the Mail Applet in Outlook, then we suggest you try the below steps to come out of this annoying issue.

Step 1: To commence the process, launch Outlook 2016.

Step 2: Go to the 'File tab', tap 'Account Settings' and after that, tap 'Account Settings'.

Step 3: Go to the 'Data Files' tab and then click on the 'Add'.

Step 4: Now, you can add the data file as required and then hit on 'Ok'.

Step 5: Click on 'Close' on the Account Settings and that's it.

If still encounter the error message, then it simply means that the Outlook data file that you are attempting to add is damage or corrupt. No worries!! Continue reading to learn what to do in this scenario.

2 Using Outlook Inbox Repair tool

If you are not able to fix the error using the above method, then it's time to take advantage of the Outlook Inbox Repair tool for scanning the Outlook data file. The Outlook Inbox Repair tool, also known as scanpst.exe utility, is an in-built repair tool in the Microsoft Outlook client. With the help of it, you can repair the PST file that is damaged due to some unknown reason.

Below is the step-by-step guide on how to Use the Outlook Inbox Repair tool:

Step 1: To start with, use 'Windows Key + R' to open the Run dialog box.

Step 2: Enter the below path and hit on the 'Ok' button.

'C:Program Files (x86)Microsoft OfficerootOffice16'.

Step 3: Double-tap the 'SCANPST.EXE' file to run the Microsoft Outlook Inbox Repair tool.

Step 4: Click on the 'Browse' button and find the .pst file that you would like to repair. Then, click the 'Open'>' Start' button.

Microsoft Outlook An Unexpected Error Has Occurred

Step 5: Make sure to check the option that says 'Make a backup of scanned file before repairing' and click on the 'Repair' button.

In a while, the Outlook Inbox Repair tool will repair your .pst file. Once repairing it successfully, you can open Outlook and the problems with it should now be fixed.

3 Try the third-party Outlook repair software

None of the above methods worked to help you fix Microsoft Outlook an unknown error occurred 0x8000ffff? If so, you certainly need a more powerful solution and it is Stellar Outlook Repair.

Stellar Outlook Repair comes in handy when it comes to repairing the PST file. Indeed, this tool is one of the ultimate recovery solutions out there for Outlook users. With the help of it, you can repair the PST file effortlessly and restore your mailbox data from it. What's more? It is the best PST recovery solution for Outlook 2019/2016/2013/2010 and older versions as well.

Get the 3rd-party Outlook repair tool - Stellar Outlook Repair from its official site on your computer and then follow the below steps to learn to use it t repair PST file:

Step 1: Add PST file

Run Stellar Outlook Repair. From the Home tab, choose 'Outlook PST' and click on the 'Browse' button to add the PST file. Once adding the file, click on the 'Repair' button. Or if you don't the exact location of your PST file, then click 'Find' and the software will find the file.

Step 2: Repair the PST file

Once you click the 'Repair' button, the software will scan and repair corrupt PST file. Let the software complete the scan process.

Microsoft Office Outlook An Unexpected Error Has Occurred

Step 3: Preview and save

The software lets you preview restored Outlook mailbox data in the Left pane. Select the mailbox data by choosing the individual folders and hit on the 'Save Repaired File' option in the Home tab. Finally, choose PST as a file format and tap 'Browse'>' Ok' to save the restored PST.

Further Reading:
Here are the useful articles to help you.
1. Outlook Mailbox Is Full Can’t Send Messages Error.
2. Fix Outlook an Unexpected Error Has Occurred Issue.
3. Solutions to Outlook Error 0x800ccc13 Cannot Connect to Network.

Microsoft Office Outlook An Unexpected Error Has Occurred Now

The Bottom Line:

Microsoft Office Outlook An Unexpected Error Has Occurred Today

That's all on what to do to resolve Microsoft Outlook an unknown error occurred 0x8000ffff. The common workarounds will probably help you fix this error. However, if nothing works, then the Stellar Outlook Repair role comes in. Indeed, we even highly recommend you give Stellar Outlook Repair a try as it will help you repair the PST file and recover the mailbox data in no time.