How to fix Outlook error code 421?

Microsoft Outlook is one of the well-known operating bodies of Microsoft. This is one of the improved technologies that will help you to be more productive. The Outlook is a flawless email client which comes with Microsoft Office and this email client approves users to easily download email messages that they are receiving from their browser-based email service.

There are numerous problems faced by the users regarding the Outlook error code 421 and that might happen when you encounter error message while sending and receiving emails on server and it is a very chaotic situation and for this, you may contact our Outlook customer support team which is very knowledgeable and talented in providing solutions in a very less span of time.


  • It might occur when the active program window crashes.
  • It also happens when Microsoft Outlook error 421 is displayed on the computer screen.
  • When your system hangs frequently for few minutes.


  • It can be because of the corrupt installation or some download issues.
  • Issues might be due to virus and malware infection that has shaded the windows system.
  • It also causes when you mistakenly deleted the outlook related files.


Step1- First of all, you have to change the server settings to its maximum limit and for this, you have to open the Microsoft exchange server for utility. Where you can reset the number of inbound connections and the properties of windows.

Step2- Secondly, in order to get rid of this error you have to download the PST repair tool which will help you in restoring and saving your data in the email account and by running this repair tool you can avoid this error issue.

Hence, these are some of the simple steps that you can follow to avoid the error problem. In case, you need more help then go to the below section.

Get instant assistance from Microsoft Outlook support

If you get wedged in any kind of issues related to Outlook error code 421 then you may land up contacting our Microsoft outlook support team which is available 24/7 throughout the year and they are very talented and versatile in solving all the issues of the users. We are basically third-party service providers and we provide assistance to all the users in every possible manner. And in case, you need any type of further help then you may land up calling at our toll-free number to get instant gratification.

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