Outlook OST files cannot be opened

If you Outlook OST files cannot be opened you directly call our toll free number for instant support.OST files are a convenient way for Outlook users to write drafts and compose messages offline and later sync them once the Internet connection is enabled. But it gets problematic when Outlook OST files cannot be opened. When this error occurs, you receive a message ‘.ost cannot be opened’ when trying to open the file.

What do you do when Outlook OST files cannot be opened and why does that error in the first place? And how to repair Outlook data files when such a problem occurs? Well, that’s exactly what we will discuss in this article.

If you need assistance and want us to look into why your Outlook OST files cannot be opened, then contact Outlook Support Phone Number at +44-808-196-8126.

Reasons why Outlook OST files cannot be opened

Here are the most common reasons why Outlook OST files cannot be opened-

Outlook OST files cannot be opened,

  1. MS Outlook hasn’t been installed properly.
  2. The outlook was forcefully shut down while working with the OST file.
  3. There are sync issues between OST files and Exchange Server.
  4. Outlook Exchange Server has been deleted.
  5. Oversized OST files.
  6. Virus or malware infection.

While these are some common reasons why Outlook OST files cannot be opened, there could also be some other issues at play. Check whether you are facing these issues and if you need assistance to repair Outlook data files, contact Outlook Support Phone Number at +44-808-196-8126.

Outlook OST files cannot be opened – How to repair Outlook data files

Here are the steps to repair Outlook data files when Outlook OST files cannot be opened. You can fix Outlook OST files cannot be opened error using two ways- either manually or by using an Outlook repair tool – OST to PST converter tool.

Steps to repair Outlook data files manually with Scanpst.exe:

  1. Close and exit Outlook application.Repair Outlook data files, Outlook support phone number
  2. Go to C:\Program Files or C:\Program Files (x86) and type “EXE” in the search box and launch it.
  3. Alternatively, you can also use the Run command to search for SCANPST.EXE. To use the Run command, click Windows key + R to open the Run command and type “C:\Program Files (x86)\Microsoft Office\root\Office16” in the search box and click OK. If you aren’t using Office 16, then type the version of Office that you are using. Locate ‘SCANPST.EXE’ and launch it by double-clicking on it.
  4. Once you launch the file, the Microsoft Office Inbox Repair dialog box will open.
  5. Click on Browse and select the .pst file that you want to repair.
  6. Click Start to start the scan.
  7. If errors are found, then click ‘Repair’ to start the repair process.
  8. Do not forget to check the “Make a backup of scanned file before repairing” option before starting the backup. If you wish to change the name and location of the backup file, then you can do so by updating the box below this option.
  9. Once the process of repair is complete, launch Outlook using the profile associated with the .pst file that you repaired.

If still, Outlook OST files cannot be opened, contact Outlook Support Phone Number UK +44-808-196-8126 for support.

Steps to repair Outlook data files manually by disabling Exchange Mode:

  1. Close Outlook and open Control Panel.Repair Outlook data files,Outlook OST files cannot be opened
  2. Click ‘User Accounts’ and then select the ‘Mail’ option.
  3. The Mail Setup dialog box will appear. Click on the ‘Show Profiles’ button located in the Profiles section.
  4. Select the required Outlook profile that you want to fix and then click on ‘Properties’.
  5. Click OK.
  6. Once that’s done, you will be back to the Mail Setup dialog box. Click on ‘Email Accounts’.
  7. The Account Settings dialog box appears. Click on the ‘Data Files’ tab and select the account you want to repair.
  8. Click on the ‘Open File Location’ button.
  9. Close the ‘Account Settings’, ‘Mail Setup, and ‘Mail’ windows by clicking on the ‘Close’ button of each tab.
  10. The only tab that will be open now is the one with your Outlook files. Right-click on the .ost file that needs repair, and clicks on Delete.
  11. Open Outlook and recreate the .ost file that you want to repair.

If still, Outlook OST files cannot be opened, contact Outlook Support Phone Number +44-808-196-8126 for support.

Steps to repair Outlook data files by disabling Outlook processes:Outlook data files by disabling Outlook processes

  1. First, close the MS Outlook application.
  2. Right-click on Taskbar Menu. Select Task Manager.
  3. Go to the Processes tab.
  4. Look for either of the following processes – Communicator, Lync, Outlook, or Ucmapi.
  5. Select the shown process and click the End Process button.

If still, Outlook OST files cannot be opened, contact Outlook Support Phone Number +44-808-196-8126 for support.

Steps to repair Outlook data files by disabling Outlook cached Exchange Mode:

  1. Go to Control Panel after closing MS Outlook.
  2. Select Mail > Email Accounts.
  3. Go to Email accounts and then click on Email Tab.
  4. Select Exchange account > Change.
  5. Go to offline settings and uncheck the box beside the ‘use Cached Exchange Mode’ option. Select Next.
  6. The process is complete.

 Steps to repair Outlook data files by disabling Outlook processes:

Sometimes, add-ons create conflict within Outlook and lead to errors. Hence, disabling them and then opening Outlook might help repair Outlook data files.

Steps to repair Outlook data files by opening Outlook in Safe Mode:

Opening Outlook in safe mode may also help open Outlook OST files that cannot be opened.

  1. Go to the Outlook shortcut icon and press and hold the Ctrl key and double-click on the application.
  2. A prompt will open asking if you want to start Outlook in Safe Mode. Click Yes.

So these are the ways you can use to repair Outlook data files and understand Outlook OST files cannot be opened. Additionally, you can also try using the Outlook repair tool to repair the files and save yourself from the cumbersome process. However, ensure that you are downloading the Outlook repair tool from a safe side.

For assistance and support with diagnosing why Outlook OST files cannot be opened or with finding the right repair tool, contact Outlook Support Phone Number at +44-808-196-8126.

-Published: 14/11/2020
By: All-in-One Support

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