“Cannot expand the folder. The set of folders cannot be opened. The file .pst is in use and cannot be accessed. Close any application that is using this file, and then try again. You might need to restart your computer” : Viper Online Backup Helpdesk

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“Cannot expand the folder. The set of folders cannot be opened. The file .pst is in use and cannot be accessed. Close any application that is using this file, and then try again. You might need to restart your computer”

Danielle Logan

started a topic almost 13 years ago

This error message shows up when I try to access PST files (Outlook)..Any ideas on why this is happening?

1 Comment

Bobby Ryan

said almost 13 years ago

Solution:

The reason you are unable to access your PST file is because this folder is accessed by Viper. This is normal because the file is locked for backups.