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Troubleshoot OST Cannot be opened Outlook 365 Quickly


Dec 6, 2023

Hi there! Are you weary of trying to Troubleshoot OST cannot be opened Outlook 365 problem? After that, give up worrying. We are available to help you with your issues. Read this article to find out the best way to fix these kinds of mistakes.

First and foremost, we need to understand that the OST data file is a Microsoft Outlook cached file. When the server synchronizes with the desktop Outlook, it may be opened. It turns into an orphan and unusable OST data file without synchronization. Therefore, we must remember to first make sure that our account is configured on the server. Only then will we move on; if not, a third-party program will be used.

Without wasting any more of our limited time, let’s get started and fix the issues.

Situations when people search Outlook 365 for open OST files

Outlook cannot open the OST data file for a number of reasons.

  • If there is a synchronization issue with the exchange or server.
  • Occasionally, the dialog box appears on the screen and the OST file cannot be accessed because it is opened someplace else.
  • Because internet connectivity varies.
  • Because of mistakes in the hard drive’s sectors.
  • Outlook abruptly shuts down while it is operating. It also leads to a mistake.
  • Malicious attacks may potentially be the cause of it.
  • An improper Microsoft Outlook account installation was made.
  • Owing to the unintentional deletion of the account from the server.
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How to Open an OST Data File in Microsoft Outlook Manually?

In particular, there are two manual techniques to solve these issues.

  • Using Task Manager
  • Via Cache Exchange Mode 

1: Outlook 365 Solution for Using Task Manager OST Not Opened:-

  • To launch Task Manager, first do a right-click on the taskbar or press Ctrl+Shift+Esc.
  • Next, press the Processes.
  • This phase involves looking for Outlook. Simply choose it after you’ve located it and click End Task.

2 Using the Cache Exchange Mode Approach:-

  • Close the Microsoft Outlook program on your computer first.
  • From Windows, choose Mail from the Control Panel menu.
  • Hit on the email accounts after that.
  • Choose the email address that is displaying an issue by going to the Email tab now.
  • In this case, the Use Cached Exchange Mode option is represented by the unchecked box.
  • Finally, click Next to complete the full procedure.

The manual technique has some shortcomings, which are listed below:-

  • It takes a lot of time and effort to complete.
  • Requires technical knowledge to operate, making it difficult for non-technical individuals to do so.
  • Offers no assurance regarding data security or integrity.

We shall thus use professional software to prevent these situations. Additionally, the OST file must be converted to a PST data file. We have the option to utilize Microsoft Outlook’s Convert OST to PST program.

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Assurance Method for Outlook 365 OST Not Opening

However, the Softaken OST to PST Converter program was created specifically for those people who are looking for a quick and easy way to access an OST Data file in Microsoft 365. The program is easy to use and doesn’t require any technical expertise.

Open OST data file In Microsoft Outlook 365

simply follow the instructions.

  • Open and launch the program on your computer.
  • Select the OST file that you wish to open in your Outlook 365 account.
  • The program offers a preview option before exporting the files. Next, press the Export icon.
  • Under Pick export type, Upload to Microsoft 365 file format.
  • Finally, to complete the procedure hit Export.

Key Features of the Application

  • It can convert OST data files into multiple file format, like- PST, EML, EMLX, MBOX, MSG, Office 365, etc.
  • Because of its architecture, this utility can read damaged, orphaned, and inaccessible OST data files with ease.
  • Furthermore possesses the capacity to decode any type of security from OST data files.

There are a ton of features. Here, I’ve listed the key characteristics that set this program apart from the competition and allow it to do its very best in assisting users.

In conclusion

Finally, we Troubleshoot OST cannot be accessed Outlook 365 difficulties by using this post. Although there are two manual procedures, the integrity of the data cannot be guaranteed. We then move to the program that satisfies the needs of the user and open OST files into Microsoft 365. We can fix the issues that arise when Microsoft Outlook opens an OST file by utilizing this program in a few simple steps.

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