Why is My Outlook Not Responding?

 

Many people use Outlook as their preferred email client, but sometimes specific errors can appear in Outlook. The outlook the set of folders cannot be opened is one of those errors, preventing you from starting Outlook.

Although this is an annoying error, you should fix it using one of the solutions below.

1. Create a new Outlook profile

If you frequently get the error, the set of folders cannot be opened. You may be able to resolve it simply by creating a new Outlook profile.

Open the control panel. To do so, press Windows Key + S and enter the control panel.

Navigate to the Mail section. If you can't find it, go to User Accounts> Mail.

• Now Click the Show Profiles button.
• Select your profile and click Delete.
• In In the Mail Profiles window, click the Add button and enter the name of your new Outlook profile—Right-click on OK to save the changes.
• Now choose Automatic Account Setup or Manual Setup and follow the onscreen instructions to complete the process.

After creating a new Outlook account, the problem should be resolved, and Outlook will start working without any problem. Few users claim that you don't have to create a new profile from the Mail section.

Instead, you have to delete all profiles, start Outlook, and you will be prompted to create a new profile.

If you have multiple accounts, you can delete them all and then add them one by one until you find the one causing this problem.

2. Use the shortcut on the taskbar to start Outlook

Many users tend to pin the most used applications to their Taskbar to launch them quickly. According to users, you can avoid the error message Folder set cannot be opened simply by launching Outlook using its Taskbar shortcut.

To do that, follow these steps:

 

• Make sure Outlook is pinned to your taskbar. Otherwise, locate the Outlook shortcut and drag it to your Taskbar.
• Locate the Outlook shortcut on your taskbar and right-click. Choose a new email or the option Outlook from the menu.
• After doing that, Outlook should start without any problems or error messages. Please note that this is only a workaround, so you will need to repeat this solution every time you want to start Outlook.

3. Make sure to use a separate password for Outlook

According to users, the error The folder set cannot be opened if you are using two-step verification for your Gmail account.

Two-step verification is one of the best ways to protect your email account from unauthorized access, but sometimes problems can arise.

If you have this problem in Outlook, make sure to use a separate password for Outlook and check if that solves the problem.

4. Exit iCloud

Multiple users reported that the folder set could not be opened error appears when using iCloud with Outlook. To fix the problem, you need to log out and log back into iCloud.

 

• Make sure to completely close Outlook.
• Now start iCloud. You can do this by opening the Start menu and typing iCloud. Choose the iCloud Desktop application from the list of results.
• When iCloud opens, click the Sign out button.
• You will be asked if you want to keep your contacts, calendar, and tasks. Choose the Remove from Computer option.
• After deleting your contacts, wait a few minutes for the changes to take effect.
• Now log in to iCloud again.
• Once you log in, choose the option to sync Mail, Contacts, Calendars, and Tasks.
• After doing that, Outlook should start over, and you shouldn't have any problems.

5. Do not install the cumulative update for Exchange Server

Multiple users reported that the folder set could not be opened error message after installing the Exchange Server Cumulative Update. If you have this problem, remove this update and see if that resolves the issue.

7. Make sure you install the 64-bit version of Office

The folders' set cannot be opened may appear if you are using a 32-bit version of Microsoft Office. If you are using a 64-bit version of Windows, we strongly recommend that you reinstall Office and install the 64-bit version.

The 64-bit version offers better performance on 64-bit systems, so there is no reason not to install it. Users reported that they successfully resolved the issue after installing the 64-bit version of Office, so be sure to give it a try.

8. Remove the user from the delegates and add them again.

This error message can sometimes appear when using a shared mailbox. To fix the issue, users suggest removing users from delegates or permission-level access and adding them back.

After doing that, you have to restart Outlook, and the problem should be resolved entirely.