How To Solve Error [pii_email_603d20f978fb1fc44cee] Step By Step


This [pii_email_603d20f978fb1fc44cee] is a Microsoft Outlook error code, this error occurs when Outlook is not performing properly. There are multiple reasons for occurrence for this error, normally it is at a fundamental level and will be easy to resolve but outlook will not work properly.

As the occurrence of this error is due to multiple factors, correspondingly this requires more than one solution, because you do not know exactly why this error is occurring. Let’s put our attention to the number of solutions that can help resolve the issue.

Method 1: Clearing cache

As we know these days a lot of software work very closely with cache for fast retrieval but sometimes it can be a problem too, information stored in the cache can get stuck there for multiple reasons, let’s not go there as it is an entirely different issue. What you can do resolve it to delete the cache manually, so fresh info can come in, and breaks the bottleneck.

Method 2: Running automatic repair from a tool

Microsoft software is really good and all of them come with a troubleshooter safety for times like this. Go to Microsoft office 365 select outlook from the list, and then click altar to the fail-safe menu. Click the fix button on the screen. It will start a trouble-shooter, wait for it to repair. This is a very useful tool; it will either solve your issue or tell you the exact problem you are facing.

Method 3: Update the version or reinstall outlook

This solution should be your last resort, and before performing this solution backup all your emails and save those files locally on a computer so they are safe and uncorrupted.

  • Open control panel on your computer and select all programs
  • Find outlook form the list of program and select.
  • Hit uninstall on the top left side of the window.
  • Confirm the uninstall
  • Once it is all done, open Microsoft office 365 and reinstall latest outlook version
  • Follow installation instructions it is pretty straight forward.
  • Restart your PC after the installation is complete
  • Open Outlook and you should be all set.


This article is to help you with small outlook related problems; these solutions only define options for those who are not tech-savvy. These are soft solutions and can resolve basic errors quickly. Keep these solutions for your day to day error resolution.

If you have server problems or more technical issues please refer to the customer support on Microsoft 365.

If you do not have a premium account with Microsoft office 365 then, you should try to reinstall the complete office setup, just remember to delete all Microsoft office attributes before. So all the cache threads can refresh and no old info will be saved.

Installing a fresh office setup will resolve small service unavailability issues.

Now your error [pii_email_603d20f978fb1fc44cee] is resolved!