4.5 C
New York
Saturday, October 31, 2020

How to Fix ‘Cannot Open Your Default Email Folders’ Error in Microsoft Outlook

MS Outlook from Microsoft is one of the foremost used email clients serving not only Windows users but also Mac users (as Outlook for Mac) providing ease with email handling. With lots of perks on one side, there are some drawbacks to the other. From many Outlook users, many undergo sudden issues popping on the sort of nowhere such as “cannot open your default email folders error”. Microsoft launched numerous service & product specific forums on which the users can post their queries. If you’ll have a sight on Office forums, it is easy to notice the wave of issues with which users are struggling with and the ways in which they are affecting their productivity.

How to Fix ‘Cannot open your default email folders’ Error in Outlook
There are many errors to look forward to while running Microsoft Outlook in compatibility mode, and one of them that is so popular is “Cannot open your default email folders. The information store could not be opened”. We are going to be proffering possible solutions to fixing the error.

Understand why OST file corrupts!

OST files are Offline Storage Tables, which holds a replica of the first mailbox available on the Exchange Server. This copy synchronizes at specific intervals. Thus it enables the account owner to possess access to the mailbox all the time even without the server connectivity.

There are several reasons why Outlook’s OST emails become inaccessible (Cannot open your default email folder):

  • Deletion of file(s) or folder(s) from Exchange folder.
  • Malware or virus attack.
  • Synchronization failure due to abnormal shutdown failure.
  • The outlook is crashing because of internal discrepancies.
  • Bad sector error within the disk drive where the OST file is stored.
  • Changes in the internal structure of the Outlook OST file.
  • Add-ins are causing damage to the OST file.

How to Fix OST file corruption issue

  1. Remove silent (not in use) Outlook OST profiles:

Open Outlook and navigate to File tab > Account Settings > Manage Profiles; click Show Profiles. From there you’ll select all the silent Outlook profiles and take away them.

  1. Make another copy of the Outlook OST file; this may eliminate all the problems related to the old OST file.
  2. In case if the error isn’t sorted even after browsing the above steps then, create a replacement profile.

Error due to running in Compatibility Mode

Generally, Compatibility Mode isn’t required for Outlook (any version) on Windows Vista, 7, 8, 8.1, and 10. So, it’s not suggested using compatibility mode for any application that’s designed for Windows.

Below are the most common errors which you might have encountered because of running Outlook in Compatibility Mode:

  • “Cannot open your default email folders. The information store could not be opened.”
  • “Cannot start Microsoft Outlook. Cannot open the Outlook Windows. The server is not available. Contact your administrator if this condition persists.”
  • “Cannot display the folder. File access is denied. You don’t have the permission required to access the file: C:\Users\XYZ\localsettings\application\data\microsoft\outlook\outlook.ost”

Compatibility mode creates conflicts if enabled for Outlook. Therefore, you must think of disabling it if you face any issues.

Steps to Disable Compatibility Mode on 64-bit Windows OS

  1. Navigate to the address: C:\Program Files(x86)\Microsoft Office\Office XX\Outlook.exe.
  2. Right-click on the application (exe), click on Properties, and select the Compatibility tab.
  3. Remove the checkbox named Run this program in compatibility mode, click Apply; click Ok.

If still, the Compatibility tab is missing, then execute the steps below:

  • Click Start > search for Program Compatibility Troubleshooter.
  • Start the utility; click Next;
  • Select Outlook XX from the list of programs.
  • Follow the steps for disabling Compatibility Mode.

Addittional Guide

Use a professional tool

Using a professional OST to PST Converter tool is that the best thanks to repairing and recover OST file data and avoid any chances of things going bad. It is quite common that not all the users are techy and possess enough technical knowledge to return over issues like this, especially once you are handling your business email with Outlook.

With this tool, you can re-create and recover damaged OST files without even worrying about fixing the issue in the first place. The tool offers a fragile GUI for simple access & offers standard user-friendliness. You can even import multiple corrupt or damaged Outlook OST files directly and repair all of them during a single go.


It is often difficult to seek out out an appropriate solution for the error you are facing with Microsoft Outlook, as there are many errors that will occur and reflect badly on user’s productivity. We’ve listed the most appropriate methods which can come handy in such a situation in dealing with cannot open your default email folders error. Overall, it’s recommended to use a knowledgeable tool initially to avoid data loss.

There are many errors attached to running Microsoft Outlook in compatibility mode, one of them is “Cannot open your default email folders. The information store could not be opened” which happens to be the focal point for this article, I strongly believe by following the guidelines above, you should have a breakthrough with fixing the issue.

Olawale Danielhttps://olawaledaniel.com/
Olawale Daniel is a business builder and psychologist, a network marketing professional, a world-class motivational speaker, a successful internet entrepreneur and a digital media strategist interested in all things mobile and digital — start-ups, media, branding. He started TechAtLast back in 2010 as a platform to quench his thirst for latest technologies. As a motivational speaker and author, Olawale has published several motivational and personal development books and he's currently working on "SUCCESS AHEAD - Don't Quit" which is billed to hit the stand by Q4 of the year. He writes regularly on his personal website on motivation and personal lifestyle and tips for network marketing success, OlawaleDaniel.com. His latest book on How to Sponsor More People in Your Network Marketing Business is still one of the best sellers in its category. He's presently working as a Health and Wellness consultant at BURN SLIM TRIM Inc., a firm that helps people regain their perfect lifestyle through state-of-the-art recent discoveries way back from nature. He's also the brain behind FOBCourse, a business university for startup entrepreneurs in Africa.

Related Articles


Please enter your comment!
Please enter your name here

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Stay Connected

- Advertisement -

Latest Articles