Category - OST Recovery

Your Outlook Data File (OST) Cannot Be Configured’ in Outlook 2013 – What to do?

Nikita Garg

Nikita Garg

May 28, 2018

MS Outlook 2013 sometimes fail to start with the display of any of these errors:

  • Your Outlook data file cannot be configured. <path of .ost file>

  • Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened.

Let us know a little about the error and the methods to remove this error.

The reason for Outlook cannot be configured error

this issue occurs due to the following type of registry configuration on the computer:



DWORD: UseLegacyCacheSize

Value data: 1

Manual method to resolve ‘Your Outlook data file cannot be configured.’

This manual method involves modifying registry value. As incorrect registry modifications can cause issues, it is recommended to backup the registry before starting.

  1. Exit Outlook.
  2. Open the Registry Editorbox by selecting Windows + R on the keyboard. Type exe and then press OK.
  3. Once the Registry Editor box opens, locate:


  1. Once located, right-click on the value “UseLegacyCacheSize,” select Delete.
  2. Click on Yesand exit the registry editor.

This will solve the ‘Your Outlook Data File (OST) Cannot Be Configured’issue in MS Outlook 2013.

Mailbox inaccessibility due to Exchange issues

Sometimes user mailboxes can be inaccessible due to Exchange issues like crashes, mailbox deletion, etc. In such situations, users can convert their OST files to PST files so as to access the mailboxes instantly. For this, they need to rely on a third-party OST to PST Converter.

Recoveryfix for OST to PST is one such expert tool that works well with accessible as well as inaccessible OST files for converting them to PST file format.


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