Resolved:Unable to Expand Folder Error of Offline Storage Table

It has been seen that while trying to add another mailbox to Microsoft Exchange Server service in Outlook. It produces an error “unable to expand folder” Microsoft Office Outlook could not access the specified folder location.

Do you know - Causes Behind this Error

It seems that "Folder Visible" option for the second mailbox is not set by you.


Turn on the Folder Visible option for the mailbox that contains the folder you want to share.

How to Select the Folder Visible Option?

Following steps can be applied in order to select the folder visible option.

1. Select the folder you want to share on your pc, right-click the Mailbox, in the Folders list and click Properties, on the shortcut menu.

2. Go through the Permissions tab, make selection of Folder visible option in the Permissions area.

3. Finally, Hit “Ok” tab.

4. You can assign permission to assigned folder.

Another Alternative

You can run Inbox repair tool to fix “Unable to expand folder” error of OST file. Inbox Repair Tool(scanpst.exe tool) is a free utility provided by Microsoft to scan and repair OST file. This utility will fix different errors of OST file and scans OST file for synchronization errors. To start repairing Microsoft has added scanpst.exe utility in MS Outlook that can scan OST file for synchronization errors. This inbuilt recovery tool is located in the Local MS Office folder of your computer disk.

To Run Inbox Repair tool, you need to go through following procedure;

You need to follow the below procedure to run scanpst.exe utility. Firstly close the Microsoft Outlook.

Go Through (C :) Drive >> Hit the "Program Files" >> "Microsoft Office" >> "Office14" >> Go to "SCANPST".

Click on the "SCANPST" as shown in above screen

Choose the ost/pst file have to repair and choose the repair button

Once, it will show a "Repair complete" message. Press the "OK" button.

Conclusion: The article is discussed about how to fix “Unable to expand folder” error of Offline Storage Table. You can get simple steps to set the folder visible option as well as steps to run Inbox Repair Tool to resolve synchronization errors of OST file.