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Microsoft Outlook is a popular data management application which allows the users to manage their personal data like emails, journals, contacts, notes, appointments etc in a much secured manner. This application is available with elegant and interactive interface which offers easy and fast accessibility to the saved PST files. But this application does not show stable performance all the time. In some critical cases it happens that outlook gets corrupted and thus fails to work properly. In this situation outlook shows various errors when you try to perform any tasks or operations in it. One such error is Outlook unable to expand folder error.
You might have experienced a situation in which you make attempt to add a new mailbox folder in outlook application in order to access PST files directly from that folder. But you really get shocked after seeing that this process gets interrupted in between and an error message appears on the screen as:-
“Unable to expand the folder. The set of folders could not be opened.”
Once this error message appears on the screen then you are not allowed to access the PST files which is really very annoying. One question that might be appears on the user’s mind after getting this error is that why this error occurs? What are the reasons responsible for Outlook unable to expand folder error? This error can occurs on the screen when folder visible option is not set as True. Despite of this, corruption in outlook is also a major reason responsible for this error. The outlook gets corrupted due to various adverse causes like virus infection, malfunctioning of application, faulty system shut down, oversized and hefty PST files and many more.
It is very necessary to fix aforesaid error quickly in order to access PST files smoothly, without facing any errors. You can follow the below mentioned manual steps to fix Outlook unable to expand folder error.
- Right click on the specific PST files and go the properties
- Move to the permission tab
- Check mark the folder visible option
- And then click on OK button
And in the case if these steps fail to fix the error then it is very sure that the problem arises either due to oversized PST files or corruption in outlook. In this situation you are recommended to make use of genuine PST repair software which can easily resolves the corruption issue of outlook, split oversized PST files in smaller parts and thus fix Outlook unable to expand folder error easily. No technical skill is needed to operate this software as it is available with easy and interactive interface.
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