It is not unusual for many Outlook users come across some common or uncommon errors thrown out by Outlook. In this article, we will introduce 3 methods to fix a common Outlook error "Cannot expand the folder", so to help all Outlook users.

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“Cannot expand the folder.The set of
folders cannot be opened…”
Negotiate Outlook error

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It is not unusual for many Outlook users come across some
common or uncommon errors thrown out by Outlook.
The most upset situation is that we rack our brains to fix the
problem but finally failed. Sometimes it even leads to severe
data loss.
How to avoid a more serious situation and resolve the problem
swiftly and completely?
Today, we will show you by a typical example in following
pages.

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While you meet errors shown as
below, take it easy, follow our steps
to free yourself from trouble.

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1.Using the CHKDSK to check
and fix disk errors
1.Click “Start” button, and type “CMD” in the search field.
2.Next, click “CMD.exe” to run this program.
3.Finally, enter “CHKDSK” into it and press “Enter”.
Then the tool will check and fix any disk errors automatically.
If errors still occur after this process, you are looking at a PST
corruption.

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2.Lanuch the inbuilt program to recover
the damaged PST file
This tool is located at MS Office folder under Program files.
(1) Start the “ScanPST.exe”.

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(2) Click the “Browse” button to select the PST
file to be repaired.

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(3) Next, click “Start” to begin the checking process.
The application will start checking the file and show
the status.

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(4) After the checking process, the tool will report the
errors found. Then, you can click “Repair” to solve the
errors.
Note: It is recommended to choose the check box
“making a backup of the scanned file before
repairing” to make a backup for you data file .

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3. Using a specialized recovery tool
After the recovery, if you can use the Outlook in normal
manner, problem is solved.As MS inbuilt program is known
for itsWeak effect, error can’t be resolve thoroughly in most
instances.
At this time, you may need a more effective application like
DataNumen Outlook Repair to deal with stubborn errors.

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Thank You !!!