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Cannot Start Outlook 2016 OST File, Cannot be Opened Issue – Solved

Cannot Start Outlook 2016 OST File

An outlook OST file is an offline folder file of the Microsoft Outlook application. This file stores the copy of the mailbox data items on the Exchange server.

OST file permits the user to work offline when the connection between the Exchange server and the Outlook application is established.

All the changes made by the user in offline mode get synchronized with the Exchange server.

Sometimes MS Outlook users cannot start Outlook 2016 OST files cannot be opened.

It means that Outlook users cannot access the OST file in Outlook 2016 and its below versions. Let us understand the situation with the help of the query asked by the user.

Cannot Start Outlook 2016 OST File Cannot be Opened Issue

“All of a sudden, when I tried to open Outlook application, I got an error message that it cannot start Outlook 2016 OST file cannot be opened.

I don’t know what to do in this situation, and This OST file contains my important official mailbox items. Please suggest appropriate methods to resolve this issue. Thanks!”

If you are facing such issues as Outlook OST file cannot be opened windows 10 and below versions, then this article is for you.

In this article, I will discuss the primary reasons which cause this problem. Also, the best and possible solution to resolve this issue. Before moving to the solution part. Let us first discuss the reasons.

Potential Reasons Responsible For Microsoft Outlook OST File Cannot Be Opened Error.

There are many possible reasons why the user cannot start Outlook 2016 OST file cannot be opened issue.

Outlook users face this problem due to the corruption in the OST file. A few of the reasons are discussed below.

  1. Abruptly or forcefully terminated Outlook application.
  2. Improper installation of MS Outlook application.
  3. Due to synchronization between the OST file and Outlook application.
  4. If the Outlook exchange server is deleted and your OST file becomes orphaned.
  5. Due to bad sectors present on the hard drive.
  6. OST files will be corrupted due to bad sectors on the hard drive.

Manual Method To Resolve Cannot Start Outlook 2016 OST File Cannot be Opened.

Method 1: By killing the entire MS Outlook-related process from the task manager.

  1. First, Open the taskbar by pressing Ctrl + shift + Esc.
  2. Now click on processes, or if you are using Windows 10, click on the details tab.
  3. Now search for the processes such as CommunicatorOutlook or UCMAPI. If the user finds any of these processes, just select and click on End Task.

Method 2: Use Inbox Repair Tool SCANPST.EXE to Repair the Corrupted OST file

The user can try Scanpst.exe to resolve this issue. Inbox repair tool or scanpst.exe is used to diagnose and identify problematic PST and OST files. This utility assesses the state of the file structure.

If it is no longer organized in its appropriate structure, then this Inbox repair tool will reconstruct the appropriate headers after correcting the error with a reset.

The user can refer to this to know how to repair corrupt OST file Outlook 2016 and below versions.

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Downsides of The Manual Process

  • The manual process is long and consumes lots of users’ time.
  • This process requires strong technical skills.
  • Also, there is a high risk of data loss is there. It doesn’t guarantee data integrity and security.

Automated Solution to Solve Outlook OST File Cannot be Opened Windows 10 and Below.

As we have seen that the manual process has major limitations. So it is better to take the help of OST to PST Extractor application.

This tool helps the user convert the Outlook Outlook OST file to PST. The user can also perform the conversion process if you have corrupted or orphaned OST files.

This is an excellent solution to export the corrupted OST file to Outlook PST file format. The user can later import the resultant PST file into the Outlook application. Moreover, this application is compatible with all versions of Windows.

Final Words

Outlook users often have to face this issue: Cannot start Outlook 2016 OST file cannot be opened.

There are various causes of this error, like the abrupt shutdown of the Outlook application, any synchronization issue between the OST file and Exchange server, etc. So we have given the manual solution to resolve this problem.

But in the manual process, there is a high risk of data loss. So it is better to take the help of an expert solution to convert OST to PST files.

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