What Is Pii Error? | How To Troubleshoot Error Code [pii_email_355f99a9c684c0f15d2c]

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If you are getting the ‘pii’ error on your Microsoft Outlook, then you can try either of the following solutions:

However, before we look in detail of all the solutions mentioned above, first, let us understand a little more about the infamous ‘pii error” which is frequently haunting Microsoft Outlook users, so we can deal with them accordingly thereafter. 

How To Troubleshoot Error Code [Pii_email_355f99a9c684c0f15d2c]

What is Pii Error?

First and foremost, the term ‘pii’ in those long error messages on your screen stands for “Personally Identifiable Information”.

The ‘pii’, thus is something which helps Microsoft Outlook to recognize a particular individual specifically and uniquely across the Internet, without confusing that particular user with any other.

Things like Postal address, Social Security number, Phone number as well as E-mail addresses which are unique to individuals, may be seen as Personal Information which could be used similarly to PII.

Thus, in short, PII can be referred to as any such information which is unique to a particular individual and can be used in order to identify and verify a particular individual from others.

What Is Pii errors in Microsoft Outlook?

Although, the error we have taken up for discussion today is the [pii_email_355f99a9c684c0f15d2c].

In fact, there are a number of other similar pii errors which may pop up on your Microsoft Outlook from time to time as a result of incorrect parameters during initialization itself. 

A few of the many reasons which may lead to such pii errors to occur frequently may involve the following,

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  • Feeding in the incorrect port number
  • Failed authentication
  • Insecure connections
  • SMTP server struggle
  • Undermined running program

Apart from this there may be other reasons too which may cause such pii error to occur. To solve these errors, you can simply follow either of the listed solutions as described below. 

How to solve [pii_email_355f99a9c684c0f15d2c] error in Microsoft Outlook?

Here, although we have only considered and taken into account the [pii_email_355f99a9c684c0f15d2c] error, the following solutions are applicable on other pii errors as well which too have been listed at the end of the following article, “Types of pii errors in Microsoft Outlook

  • Remove Current Accounts
  • Reinstalling the Microsoft Outlook app
  • Changing port numbers of the server
  • Clearing your browser history and cookies
  • Disabling your Anti-virus
  • Using Windows Auto-repair tool
  • Checking your Microsoft Outlook Settings
  • Update Microsoft Outlook app

1. Remove Current Accounts

Using multiple accounts in Microsoft Outlook, often may result in SMPT server errors. In such cases, logging out and removing accounts may seem like the best and easiest solutions out of the many which can resolve pii errors. 

2. Reinstalling the Microsoft Outlook app

Another method, with the help of which you can most probably get rid of the above pii error is uninstalling and reinstalling your Microsoft Outlook App on your device. 

3. Changing port numbers of the server

For the following solution, you will need to first go to your Microsoft Outlook’s Account Settings and then under the Advanced Settings, click on the Internet Email Settings option and change the port number from 465 to 587. After all that is done, simply click on the OK button and restart your PC.

4. Clearing your Browser history and cookies 

One of the most common reasons for pii errors to occur very frequently is due to the unnecessary data stored in a system’s cache memory. Hence, clearing your browser history as well as cookies altogether may just do the trick.

5. Disabling your Anti-virus

Anti-viruses at times have a reputation of hampering the normal functioning of applications which are legit and nowhere near malicious.

Even in the case of Microsoft Outlook too, there may be instances where the anti-virus installed on your particular system may act up and hamper the working of apps such as Microsoft Outlook and as a result give you the pii error. 

Thus, it is advised that you try disabling your anti-virus as well while trying to fix the pii error prompted by your Microsoft Outlook app.

And of course, once the error has been dealt with, make sure to turn back on your anti-virus so that nothing gets compromised later on.

6. Using Windows Auto-repair tool

If none of the above solutions seem to work, then using the auto-repair tool for Windows may just get your job done. It is by far the most effective one in our list of solutions so far. Hence, if none of the previous solutions work. You can most certainly give the Auto-repair tool a try.

If you are using Outlook 2019, 2013 or 2016, then you can also try going to Microsoft Outlook’s account settings and then click on the Email tab.

Then choose the profile which you want to repair and click on the Repair option.

Thereafter, follow the desired options prompted on your screen, after which restart the Microsoft Outlook app.

7. Update Microsoft Outlook App

At times like this if nothing else seems to work, then updating an app may seem like the best option. Updating an app usually helps resolve any issues which may have been present in the current version of programs.

Similarly, even in the case of Outlook, if such pii errors seem to be present and persistent, then updating the app can help fix those issues. 

What Are Types of Pii Errors in Microsoft Outlook?

Below is the complete list of all possible Microsoft Outlook API errors:



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