-
Written By Mithilesh Tata
-
Updated on April 1st, 2022
Hunting a solution to resolve “Outlook .ost cannot be opened” error in Microsoft Outlook? Don’t be panic. In this article, we will try to give a perfect and authentic solution to the users using which they can easily regain their OST fill data in Outlook.
Microsoft Outlook is a prominent email application that provides various facilities to users. In Outlook, an OST file is utilized in order to do the daily task. Unlike PST files, one need not local machine always connect to Server as it allows to work offline and sync with Microsoft Exchange Server to update the changes. The default location of the OST file is:
C:drive\Users\AppData\Local\Microsoft\Outlook.
The Outlook .ost data file to gets corrupted just like any other file. It faces OST corruption due to various viruses, malware, and other issues. Due to the corruption, OST file mailbox data items including emails, contacts, calendars, events, journals, etc. become inaccessible to the users.
In such scenarios, multiple errors pop up like ‘Default Outlook .ost cannot be opened’. One way to save emails and to prevent any such action is to backup emails at a regular interval, Archive Outlook .ost file to read email messages in case of server maintenance or downtime.
Outlook users must be familiar with the OST file. So, there are chances that they might encounter the problem Outlook OST cannot be opened. Some other OST file errors which are very frequent and are faced by Outlook users are:
If an error message mentioning Outlook OST file cannot be opened is displayed while opening Outlook OST file, you can try to open the OST file by using certain methods such as – starting Outlook OST file in Safe Mode, turning off Compatibility Mode, and so on.
If nothing works out and the OST file still refuses to open, this doesn’t mean that you can’t access the OST file again. There could be various factors behind OST file corruption which have been described below.
There are some probable reasons which may cause the above-mentioned error:
Users can troubleshoot this OST file issue using manual approaches. For this, first, take a backup of .ost file. If the issue continues, you can try to restart the system. Here, the manual solutions for fixing Outlook .ost cannot be accessed errors are discussed.
Although Outlook Add-ins use to enhance the functionality of Outlook, faulty add-ins may sometimes create more trouble. Thus, disable the add-ins by launching Outlook in safe mode by just typing outlook /safe in the Run dialogue box.
Try “Save and Send” and if it works, a faulty add-in is the main reason behind the error. You can also start Outlook in safe mode by following the below-mentioned steps:
Microsoft facilitates the users with an inbuilt ‘OST Integrity Checker tool i.e. called ScanOST.exe which helps to rectify minor corruptions in OST files and resolves Outlook OST file errors.
Repairing the Outlook OST file with ScanOST.exe is a smart way to fix the “Outlook .ost cannot be opened” error. However, this Outlook inbuilt utility is available with Outlook 2007 and lower versions only.
If both the above methods don’t work to resolve the “Default Outlook .ost cannot be opened” error, you can opt for ScanPST.exe utility to fix this error. Although, ScanPST.exe works only in case of minor OST file corruption. Hence, Experts advise the use of a third-party OST to PST Converter software to recover and convert severely corrupted OST files and the data associated with it to PST.
Though, using the above manual methods, one can easily resolve the “Outlook .ost cannot be opened” error. But, if a problem still occurs, you can surely go for a quick and better solution, you can choose to use a professional OST to PST converter. Hope the article helps.
About The Author:
Mithilesh Tata is an Email Migration and Data Recovery Expert. He has a keen interest in Technology & Entrepreneurship. Also, he loves cricket, music, and books.
Useful Links