Solve Cannot Expand Outlook Folder Error

Written by Lucy John on May 02, 2023

“When I try to set up another mailbox to my Outlook folder list, I get the error message ‘Unable to expand the folder. The set of folders could not be opened.’ Even, this error not is letting me to access data in my Outlook profile. Please someone help me in fixing this error? Thanks”

Most used and secure email client i.e. Microsoft Office Outlook sometimes creates troubles to its users with unknown or complex error messages as mentioned in above scenario. Generally, the error ‘Unable to expand the folder. The set of folders could not be opened.’ Or’ Unable to expand the folder. Microsoft Office Outlook could not access the specified folder location.’ pop up when you have not enabled "Folder Visible" option for another mailbox while trying to add mailbox from another computer or while attempting to open shared folder like contacts folder in mailbox. In order to troubleshoot this error just set “Folder Visible” option for mailbox that contains the folder which you intended to share / access.

However, this error badly impact on Outlook PST file when your Outlook profile filled with plenty of mailbox items, public folders, contacts, notes, reminders and many more elements. This perhaps can cause corruption to Microsoft Outlook PST file and make respective Outlook profile inaccessible. In case, you have lost access to confidential and essential Outlook folders after ‘Cannot expand Outlook folder’ error, then don’t worry!! Make use of suitable Outlook PST file repair tool in order to regain access to various Outlook PST elements.

Utility to fix cannot expand Outlook folder error:

Yodot Outlook PST Repair tool is particularly designed to fix Outlook PST file that has become unreadable due to error like ‘Cannot expand Outlook folder’ on Windows computer. This tool is designed with resourceful scanning technology to detect and fix corruption issues in Outlook PST file after cannot expand Outlook folder error. One can also fix PST file has no data error, Outlook PST do not have permission to open error, Outlook does not recognize PST file error, set of Outlook folders cannot be opened error, Outlook data files not responding error and many more errors. This program mends corrupt or inaccessible Outlook PST file and recovers all mailbox elements such as contacts, reminders, journals, notes, etc. This application also repairs various logical errors in PST file & OST file on various version of Microsoft Office Outlook application like Outlook 2000, Outlook 2003, Outlook 2007 and Outlook 2010. You can run this software on Windows desktop or laptop having Windows 11, 10, 8.1, 8, 7, 2008, 2003, XP and Vista operating systems.

Steps to fix error cannot expand Outlook folder:

Things to Remember:

  • Try to get complete information about any activity that you going to perform in Outlook to overcome logical errors
  • Archive Outlook PST file contents or delete unnecessary Outlook elements to avoid errors or various common issues
  • Backup MS Outlook PST file on daily or weekly basis on secure storage space

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