4 Quick Fixes for Error 0x80070021 in Outlook 2016/2010/2007

Outlook is an Email application developed by Microsoft. Users use it to send and receive Emails. MS Outlook has millions of active users across the globe. Due to current work-from-home culture Emails have become the primary source of communication. It can be downright maddening and can affect the performance when Outlook displays unexpected Errors.

In this blog, we will discuss the various methods to Fix Error 0x80070021 in Outlook 2016. IT Experts suggest PST File Recovery for a quick and reliable fix of PST files. Error 0x80070021 is usually caused when a user attempts to back up Outlook PST files. Without any further delay, let’s get started.

Safety Measures to Prevent Error 0x80070021

This issue commonly arises in Outlook or any other Windows program that utilizes background processes. Applications like Skype, Google Calendar Sync, and Microsoft Office Communicator could contribute to the occurrence of this error. What steps can be taken to eliminate or fix error 0x80070021 in Outlook 2016? Consider the following guidelines:

• Outlook 2013 and 2017 support a PST file size of up to 20GB, while Outlook 2010, 2013, and 2016 support up to 50 GB. To prevent corruption, it’s advisable to err on the side of caution and keep your Outlook PST file below 10GB.
• Avoid abruptly closing the Outlook application, as doing so might lead to damage to your Personal PST folder.
• For Microsoft Outlook 2002, which supports a maximum PST file size of 2GB, aim to keep your file size below 2GB to steer clear of error code 0x80070021.
• Opt against storing PST files on servers when safeguarding your Outlook data. Instead, store your files on your desktop to reduce the risk of corruption and the appearance of Error 0x80070021 in Outlook.
• To fend off virus attacks and potential corruption problems, install a reliable antivirus program on your system.

Manually Fix Error 0x80070021 in Outlook 2016

The following section will guide you to resolve error 0x80070021. It has three parts which are as follows:

Task Manager

• Press Ctrl + Alt +Delete and open Task Manager Or Right click on the taskbar of the desktop and choose Task Manager Option.
  
• Under the Processes tab, look for applications such as Outlook process and Click on it.
• Select End Task.

Restore Point

1. Log into your system as an Administrator.
2. Click the Start Button on the desktop >> Click on All Programs Option >> Windows Accessories >> System Tools >> System Restore.
3. Now select “Restore my computer to an earlier time”.
4. Under the option on this list, click “restore point”, select the latest system restore option and click on Next.
5. Click Next on the confirmation window.
6. Restart your system when the restoration process is completed.

You are halfway to Fix Error 0x80070021 in Outlook 2016. Proceed to the next part.

Remove Indexing Tool

1. Open Outlook, go to Tools on the Menu bar.
2. Click on ‘Trust Centre’.
   
3. On the left-hand pane, choose Add-Ins and then near the bottom of the window, you’ll see a button that will let you manage your COM Add-Ins.
4. Ensure that you have selected ‘COM Add-Ins’ from the drop-down box and then click GO.
5. Highlight Windows ‘Search Email Indexer’ and then click ‘Remove’.
6. Click OK and then close Outlook.
7. Re-open Outlook and run the backup. (The program recommends that Outlook restart before backing up)

Try all the steps and recommend restarting Outlook or the computer to have changes effect upon the next login. After following these steps a user will Fix Error 0x80070021 in Outlook 2016.

Professional Tool to Fix Error 0x80070021

The Sysinfo PST File Recovery tool offers a secure and effective resolution, enabling users to retrieve data from Outlook PST files that have become corrupted or damaged. This reliable utility is adept at directly recovering various Outlook email elements such as Emails, Calendars, Contacts, Tasks, and more from the impaired PST files, all without any risks involved. It also enables to fix Exchange Server is Unavailable error. The steps for the software are:

1. Run PST File Recovery Tool with administrative privileges.
2. Click Open, and add the problematic PST files.
3. While adding the file, choose the Recovery Mode in the Software Wizard and click OK.
4. Select the Files/Folders from the Tree structure.
5. Finally, click Save and define the destination path and the file extension.

After following the above steps you will Fix Error 0x80070021 in Outlook 2016.

Conclusion

It is time to conclude the blog. Before parting our ways let’s recall what we have gained from this blog. In this blog, we discussed Precautions and methods to fix Error 0x80070021 in Outlook 2016. The Manual method is capable of resolving the error, however, in case of PST file corruption, it is of no use. The Sysinfo PST File Recovery Tool is capable of resolving the error and fixing corrupted or damaged PST Files.

Frequently Asked Questions

About The Author:

Deep Shikha

Deep Shikha Pandey is a Tech Writing Expert having deep knowledge about Outlook, Gmail, Yahoo, SQL, and other databases and email clients. She will guide you the best about email migration and SQL Database recovery using her expertise and making all the processes a cakewalk for the readers. Make your technical journey easy with simple layman’s blogs and accurate technical information.