How to Resolve the Issue “OST File Not Recognized by Outlook”

 Causes and Solutions for the Error "OST File Not Recognized by Outlook"

When you use Outlook, do you get the error "OST file not recognized by Outlook"? – If the response is yes, there is no need to be concerned. In this piece, I'll go over all of the various remedies.

We will discuss options for resolving this mistake in this article. We'll show you how to troubleshoot "OST file not recognized by Outlook 2019, 2016, 2013, 2010, 2007, 2003" step by step.

Let's get this party started.

Let's take a look at what OST files are and why they're causing this error. Then we'll go over the OST repair tool as the best ways to fix the Outlook OST file not recognized error.

Causes of the OST File Not Recognized Error in Outlook

Many Outlook customers have issues with their mailboxes not opening or stuff missing. Depending on the version you're using, you can see errors like "OST file not recognized by Outlook 2010" or "OST file not recognized by Outlook 2016" and so on.

As a result, it's critical for consumers to understand what's causing the problem.

The most common cause of this problem is OST file corruption. When an OST file is damaged, Outlook will not recognize it.

When the OST file does not meet the mailbox size in Exchange Server, an error can occur.

Whenever the Exchange server and the OST file have a synchronization fault. The Outlook OST file is not recognized by MS Outlook.

As a result, Outlook will indicate this error in such cases.

So far, we've discussed some manual techniques to resolve these types of issues.

OST File Not Recognized by Outlook Issue: A Manual Solution

In order to overcome this kind of issues that Outlook users encounter. The manual tricks listed below should be followed.

Method 1: Recover Data from a Corrupted File

Users can utilize the scanpst.exe function provided by MS Outlook in this approach. This is a built-in tool that assists users in diagnosing and repairing faulty OST files. To do so, follow the instructions below:

Start the Inbox Repair Tool.

To choose the corrupted OST file, click the Browse button.

The scanning process will begin once you press the Start button.

The scan will generate a list of faults once it is finished. After that, press the Repair button.

Restart the Outlook application after the repair process is complete.

Keep in mind –

Only minor corruption issues in the OST file will be repaired using these approaches.

If the instructions are not followed attentively, there is a risk of data loss.

If the file is severely corrupted, you'll need to employ an automated approach to resolve the problem.

Error "OST not Recognized by Outlook" Error "OST not Recognized by Outlook" Error "OST not Recognized by Outlook" Error "OST not Recognized by Outlook" Error

You have no choice but to use a third-party tool as a solution. You can utilize the DataHelp OST Repair application to get over all of the drawbacks of manual procedures.

It can easily fix corruption issues and provide you access to Outlook 2010, 2013, 2016, and 2019 files' data. In addition, the software has a feature for repairing password-protected data files. It is possible to decrypt OST emails and deactivate OST email encryption with this program.

Method 2: Make a new OST file

This strategy may assist users in resolving the problem. In Outlook, you must create a new OST file. To create a new OST file, follow the steps in the section below:

Step 1: Close Outlook, go to Control Panel and click the Mail button.

Step 2: Select Show Profiles from the Mail Setup dialogue box, then select your profile name and Properties.

Step 3: Select the Exchange account from the E-mail menu, click the Change button and enable Use Cached Exchange Mode.

Step 4: Select Offline Folder File Settings from the More Settings >> Advanced tab menu.

Step 5: Select Disable Offline Use from the drop-down menu, then select Yes.

Step 6: Return to Offline Folder File Settings and select OK and Yes once more.

Step 7: Select Use Cached Exchange Mode from the Cached Exchange Mode Settings menu.

Step 8: Select OK, then proceed to Next and Finish.

Step 9: The Account Settings and Mail Setup wizard should now be closed.

Final Thoughts

We attempted to resolve the most common Outlook mistake in this article.

i.e. "Outlook does not recognize the OST file." We recommended several manual techniques for resolving this issue.

If you are seeing this issue as a result of OST corruption, we recommend using an automated program. The above-mentioned approach will undoubtedly assist you in resolving the issue of OST files not being recognized by Outlook 2019, 2016, 2013, 2010, or 2003.