Why does the Error pii_pn_099380057b9d5e7034c2 Occur in Outlook?

This issue occurs when a user tries to connect to the mail server via SSL encryption, and the connection does not establish. Moreover, it could be possible that SSL encryption is disabled for the email account. There are two types of encryptions provided by the SMTP servers for sending and receiving emails, i.e., SSL and TLS. If one encryption does not connect due to incorrect settings, the mentioned error can appear.

Now, I will explain what happens when this error occurs.

What Happens When Outlook Error pii_pn_099380057b9d5e7034c2 Occurs?

When this error occurs in Outlook, the following symptoms can easily be seen:

  • The Windows OS starts to crash irregularly.
  • Applications stop responding, and the device needs to restart.
  • The Mouse and Keyboard take too long to respond.

Here, I have explained the symptoms of Outlook error. In the next section, I will provide the best solutions to dissolve the above-mentioned error.

How to Solve pii_pn_099380057b9d5e7034c2 Error?

Fortunately, since pii_pn_099380057b9d5e7034c2 is well-known, there are several options to solve it. We’ll show you six methods to do this.

Method 1: Check Your Outlook Settings

As pii_pn_099380057b9d5e7034c2 results from a wrong installation setup, one of the first places you should look into for solving it is your Outlook settings.

  • Step 1: Launch Outlook.
  • Step 2: Open the Tools menu and click Accounts.
  • Step 3:  If you have multiple Outlook accounts, select the one that is showing this error and select Properties.
  • Step 4: See if it is set as per the email server by checking its ID.
  • Step 5: Click More Settings, select the Outgoing Server tab and make sure that the Outgoing Server Authentication is on.
  • Step 6: In the Advanced tab make sure that SMTP & POP settings are the same as the email hosting provider.
  • Step 7: Save settings by clicking Ok.

Method 2: Check for Duplicate Accounts

You might have a duplicate Microsoft Outlook account that is causing this error. So you’ll need to find it and remove it.

  • Step 1: Launch Outlook.
  • Step 2: Go to Account Configuration.
  • Step 3: Open the Mailing tab.
  • Step 4: Look at the list of your emails and find duplicate accounts if you have any.
  • Step 5: Delete duplicate accounts by clicking on Eliminate.

Method 3: Fix Windows Repair Tool

Windows has a built-in report tool that you can conveniently use to diagnose and fix most errors and bugs with Microsoft apps and programs. Including pii_pn_099380057b9d5e7034c2 error in Outlook.

  • Step 1: Open the Control Panel.
  • Step 2: Select Programs and attributes.
  • Step 3: Find Microsoft Outlook in the list of programs.
  • Step 4: Click Edit and then Repair.
  • Step 5: Follow the Wizard in the next window to have the repair tool automatically fix the error.

Method 4: Disable Your Antivirus Program

Antivirus programs are known to cause problems from time to time. In this case, it might be preventing Outlook from connecting from client email. You might need to disable it to solve the error, but don’t forget to turn it back on.

  • Step 1: Open the Control Panel.
  • Step 2: Go to Update and & Security.
  • Step 3: Go to Windows Security.
  • Step 4: Select Virus & Threat Protection.
  • Step 5: Click on Manage Settings.
  • Step 6: Find Real-time Protection and disable it.

Method 5: Change the Server Port Number

You might be able to solve the error by manually changing the server port number, so let’s try this method as well.

  • Step 1: Launch Outlook.
  • Step 2: Go to File and Account in the Settings.
  • Step 3: Select the email that is causing problems.
  • Step 4: Click More Settings in the email window and then Internet Email Settings.
  • Step 5: Go to the Advanced tab and change the SMTP port number from 465 to 587.
  • Step 6: Save settings by clicking Ok.

Method 6: Uninstall and Reinstall the App

If none of the earlier methods work, you might get lucky if you uninstall and then reinstall Outlook.

  • Step 1: Open the Control Panel.
  • Step 2: Go to Programs and Features.
  • Step 3: Select Microsoft Office or Outlook from the list and click Uninstall.
  • Step 4: This will open a new window. Just follow the instructions to uninstall the program.
  • Step 5: When you’ve uninstalled the program, reinstall Microsoft Office and Outlook.


Microsoft Outlook is used in day-to-day communication with another, and it helps to connect with others providing information. Email is considered one of the best methods to communicate and reach your audience. With the changing technology, Microsoft outlook is supported by every one to speak. Errors like pii_pn_099380057b9d5e7034c2 may sometimes occur because of the Error. It mostly happens because many accounts are logged in to one device. Try clearing cache and cookies from the device, and reach these steps. The above techniques will help you resolve the Error.

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