Unable to Open your Default Outlook Mail Folders
Sometimes when you start your Outlook, it may prevent you from accessing data from it and you may get an error message showing that:

“Unable to open your default mail folders, the information store could not be opened.”

Or

Network problems are preventing connection to the Microsoft Exchange Server computer. Contact your system administrator if this condition persists.

In these situations, you may not be able to access your outlook account.

Cause

This error message may occur due to the possible corruption or damage in the Secur32.dll file of your outlook. If the Secur32.dll file is missing, it may corrupt your PST files and Outlook may not be able to open these files.
How to fix it

You can resolve this issue by replacing the Secure32.dll file with the help of SFC or System File Checker. To solve this issue, follow these steps:

1. Point to System Tools and select System Information
2. Click Extract One File from Installation Disk and type Secur32.dll in the specified box.
3. It will perform some task and then save this file.
4. click ok twice

After finishing these steps, restart your outlook account.
This method works in most of the cases, but it might possible that you won’t be able to get the desired results from this method. If so, then you can’t access your outlook account and it may lead to catastrophic situation of data loss.
In these cases, you need to repair your PST files in order to make the accessible. You can perform this task with the help of Data Recovery software. These data recovery software are known as Outlook PST Repair software.

Outlook PST Repair software are specially designed data recovery tools that can help you in repairing and restoring you’re corrupted of damaged outlook PST files. These software are able to restore your corrupted files in almost all possible cases of outlook PST corruption. These software are read only and non destructive data recovery tools that just reads and restores the contents of PST files without modifying them.

Stellar Phoenix Outlook pst repair is a robust and powerful data recovery software that can repair and restore your corrupted or damaged outlook PST files. Along with the mail software, this software is also capable to repair calendar, contacts, tasks, journals and other outlook contents. Outlook pst recovery software can repair all size of PST files in all file versions of Outlook including Outlook 97, 98, 2000, 2002, XP, 2003 & 2007.