When I clicked on OST file, nothing happens. How to open it?

10 pts.
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.OST files
Microsoft Outlook
I decided to go ahead this morning and set up Outlook 2013 this morning. When I clicked on it, it came up with this message: "Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened. The file C:UsersXXXAppDatalocalMicrosoftOutlookXXX_m sn.ost cannot be opened." I looked the file is there, and Outlook '07 works just fine. All of the other O365 programs work great, no problems. How do I open ost file? Ideas?

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A .ost file is the data file that is created when you first log onto Outlook.  It is basically your Outlook profile.  If you ever have an issue opening Outlook, you can delete this file and it will be re-created when you log onto Outlook again.  There really is not need to open it as it is not an executable, just a data file. You can also use OST to PST tool to open your OST file in MS Outlook as PST file format.

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  • Alex456

    You can remove occurrence of OST errors using following procedure;

    Run Third party OST Recovery software: Nowadays, market is dominated with various OST Recovery solution. You can choose any of the trusted brand like; SysTools OST Recovery software. These solutions are also available in their free trial run.

    Run scanpst.exe utility: Open scanpst.exe in your computer and browse the OST file. It will repair corruption issues of OST file.

    Recreate OST File: You can also exit Outlook and go through control panel and mail. After that click show profile and select profile name and then properties.



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