Microsoft Outlook occasionally “pleases” its users with faults, i.e “Cannot open a set of folders” like in other programs. In actuality, poor OS setting causes numerous application failures. Mail application or system issues might cause errors. Among the most prevalent problems is a message during software activation about the incapacity to open folders. This fails to launch Outlook. In the following, we’ll discuss solutions.
If you want to look for an official Microsoft answer for it here is the link.

Product update error
Most of the time, when a user can’t open a set of folders, it’s because the software was updated in the wrong way. Most of the time, this happens to people who own versions of 2007 and 2010. In this case, it’s best to completely uninstall the program. Once you’ve done that, you’ll need to reinstall Outlook and make a new profile.
Delete an Outlook profile
Sometimes, you can’t open a set of folders in Outlook because you entered the wrong information. In other words, the problem is the user’s fault because he or she entered the wrong information in the profile. Getting rid of the problem will be easier if you delete the profile and then make a new account with only the correct information. But, even though these tips are helpful, sometimes you can’t add a new entry because the application doesn’t start all the way, which creates a vicious circle.
- The user can get help from a closed Outlook. At first, you should use the “Start” button to get to the OS Control Panel.
- A window will pop up on your screen. In the list that appears, look for the line that says “Accounts.” Click on that line to go to the “Mail” section.
- You need to delete each one by going to the “Accounts” section. Once the list is empty, the user will be able to make new accounts in the app.
Locked data files issues
Often, the application won’t open and the owner sees a message like “Outlook folders cannot be opened.” Because of a write lock, the data files can’t be accessed. These files are view-only. If you open the mail settings window, the program stops due to file blockage (described in the previous section). “Data files” button in settings. Use “Open file location” after selecting “account.”
After opening the data location, the software owner can click on the file in Windows Explorer and pick “Properties.”
The user should remove the checkbox from the “For reading” line and click “OK” to confirm. After changing settings, the “cannot open folders” issue goes gone.
If there’s no indication saying you can’t capture data, repeat the instructions for the other profiles. If no profiles have “Read Only,” look elsewhere.
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Configuration error
Due to mistakes in the configuration files, Outlook cannot open a set of folders. Setting up your mail can help with this problem.
- Users must go to the “Configurations” command from the “Show” line.
- Next, a window will pop up with a list of all the configurations that are currently set up. If the application’s manual configuration is done for the first time, there will only be one configuration in the list. You will need to click the “Add” button to add another configuration.
- After you open the new configuration window, you should give it a name, which can be anything, and then click “OK” to confirm the change.
- The next step is to add profiles for all of the email accounts that are already set up. As soon as the list is made, you should mark the last version you made near the “use configuration” line at the bottom of the window and click “OK” to finish.
- The message “Cannot open a set of folders” will go away after the software is restarted.
As practice shows, a lot of people have this kind of error. It’s easy to fix—just follow the steps in the instructions to check all of your mail settings. Of course, each one needs a different approach and a unique answer. First, you need to be aware of the rights of data files and find out if you can write to them. Most of the time, unchecking the “Read-Only” box will fix the problem, and the user won’t have to make new profiles and settings.
Conclusion
OS developers made the Outlook software product, which is a useful and functional program. If the user can figure out all of its nuances and features, it will make his work with a lot of email boxes much easier.
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