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Cannot Start Outlook: Set Of Folders Cannot Be Opened

Outlook is the most commonly preferred email client, especially in businesses. However, users face issues while using Outlook. Sometimes, you might see the “Set of folders cannot be opened” message when you try to open Outlook. You can resolve it by following the simple steps.

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1.Create a new Outlook profile

Step 1

  • Step 1:On your computer’s keyboard, press the Win and S keys together.
  • Step 2:Enter Control Panel in the search box and choose the same from the list of search results.

Step 2

  • Step 1:Go to the Mail section and click the Show Profiles button.

Step 3

  • Step 1:Once you select your Outlook profile, click the Remove button.

Step 4

  • Step 1:When the Mail Profiles window appears, click the Add button.
  • Step 2:Now, type the name of your new Outlook profile and click the OK button.

Step 5

  • Step 1:Select either the Auto Account Setup or Manual Setup option.
  • Step 2:Continue with the instructions that prompt on the screen to finish the process.
  • Step 3:Open Outlook and check if the Set of folders cannot be opened error has been resolved.

2.Use the taskbar shortcut to start Outlook

Step 1

  • Step 1:Ensure that Outlook is pinned to your Windows taskbar.
  • Step 2:If not, search for Outlook and drag it to your taskbar.

Step 2

  • Step 1:Right-click the Outlook icon in the taskbar.
  • Step 2:Select the New E-mail message or Outlook 2016 option.

3.Use a separate password for Outlook

Step 1

  • Step 1:The error message might occur if you are using two-step verification for your Gmail account.
  • Step 2:In general, two-step verification is the best way to protect your email. But, this problem might occur.

Step 2

  • Step 1:So, it is better to use a separate password for Outlook.

4.Sign out of iCloud

Step 1

Exit the Outlook email application.

Step 2

  • Step 1:Access the Start menu, type iCloud, and select the iCloud Desktop app.
  • Step 2:Click the Sign out button.

Step 3

When prompted, select the Delete from computer option.

Step 4

  • Step 1:Sign in to your iCloud account and sync Mail, Contacts, Calendars, and Tasks.
  • Step 2:If the “Cannot start Outlook: set of folders cannot be opened” problem persists, continue with the steps given here.

5.Re-install iCloud

Step 1

Launch Outlook, navigate to File -> Account Settings, and select Account Settings.

Step 2

  • Step 1:Click Data Files, select your iCloud data file, and click the Remove button.
  • Step 2:Once done, close the Outlook email client.

Step 3

  • Step 1:Launch iCloud. Deselect the Mail, Contacts, Calendars, and Tasks checkbox.

Step 4

  • Step 1:Download the most recent version of iCloud and install it.
  • Step 2:At the time of installation, you have to click the Repair option.

Step 5

  • Step 1:After the installation, restart your computer.
  • Step 2:Open iCloud. Select the Mail, Contacts, Calendars, and Tasks checkbox.

6.Delete your email account from Mail

If you have previously added your email account in the Mail app, delete it by performing the following steps.

Step 1

Launch the Mail client, go to the Accounts section, and select your email account.

Step 2

  • Step 1:Click the Delete account button followed by the Delete button.
  • Step 2:Check if the problem has been fixed.

7.Use Google’s DNS

Step 1

  • Step 1:In the Control Panel window, select the Network and Sharing Center option.
  • Step 2:Click the Change adapter settings option.

Step 2

  • Step 1:Right-click your connection and click Properties.

Step 3

Click Internet Protocol Version 4 (TCP/IPv4) -> Properties.

Step 4

  • Step 1:Now, you have to choose the Use the following DNS server addresses option.
  • Step 2:Type 8.8.8.8 in the Preferred DNS server field.
  • Step 3:In the Alternate DNS server field, type 8.8.4.4.
  • Step 4:Click the OK button.
  • Step 5:If you still see the “Cannot start Outlook; set of folders cannot be opened” error, you can get assistance from our technical experts.