Office 365 says Outlook PST cannot be found

If Outlook cannot locate your PST file, you may be interested in the following information. PST files are key files in Microsoft applications, including Outlook, that store emails, calendar events, and other data. These files are crucial when managing Outlook projects. However, some users encounter the "Outlook PST file not found" problem when starting Outlook.

Why can’t Outlook find my PST file?

Outlook keeps throwing PST not found errors, which may be due to the PST file being damaged, causing the inbox file to be too large or the data to be cluttered. Another possible cause is a damaged Outlook application.

Office 365 says it cannot find Outlook PST

If you keep getting the PST file not found error message in Outlook, here’s how to fix it:

Check your Outlook storage.

Use scanpst.exe tool to repair PST files.

Generate a new PST file.

Fix Outlook.

Use this registry adjustment.

1] Check your Outlook storage

There may be too much unnecessary data in your Outlook mailbox, which may cause the PST file to be damaged, resulting in a PST file not found error. Therefore, it is recommended that you clean your mailbox to reduce the amount of data and help resolve errors.

Outlook has a built-in inbox tool to help you free up storage space. Just click the File menu, select Information, and click the Tools drop-down menu button. Next, select the delete tool and follow the prompts to clear your inbox of junk files.

2]Use scanpst.exe tool to repair PST file

Another way to fix this error is to use the Outlook Inbox Repair Tool (scanpst.exe) to repair the PST file. Here's how you can do it:

First, press Win E to quickly open File Explorer and then move to the following folder:

• C：Program FilesMicrosoft OfficeOffice
• C：Program FilesMicrosoft OfficeRootOffice16

Note: The above location depends on the Office version you are using.

Next, locate the scanpst.exe file in the above location and double-click it to run the tool.

In the prompt that appears, select your input PST file and click the Start button.

After that, check the Backup scanned files before repairing checkbox and press Repair button.

Restart your Outlook application and check if the error is resolved.

Alternatively, you can also use one of these free tools to repair corrupted PST files.

Read: This data file is associated with the mail account OST file

3]Generate new PST file

If the above method does not work, you need to recreate a new PST file and then set it as the default data file to fix Outlook.pst cannot be found error. Here are the steps to achieve this:

• First, use Win R to call the Run command box and enter the "Control Panel" in its open box.
• In Control Panel, set View by Large Icons and click Mail (Microsoft Outlook).
• Now, press the Show Profile button and select your Outlook profile.
• After that, click the Properties button and then click the Data File button.
• From the Data Files tab, click the Add button, enter the file name of the new PST file and press the OK button.
• After creating the new PST file, select it from the Data Files tab and press the Set as Default button to set it as the new default PST file.
• Finally, restart Outlook and the Outlook.pst not found error should now be resolved.

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