Outlook Error 0x80070021: How to Get Rid of it

To fix this error, remove problematic add-ins or software

3 min. read

Updated onOctober 4, 2023

updated onOctober 4, 2023

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Key notes

Error0x80070021 arises for someuserswhen they try to copy (or back up) Outlook’s PST file to another folder.

Sadly, this isn’t the only issue you can encounter, and many reportedOutlook error 0x80040600as well. Today, let’s see how we can fix the error at hand, shall we?

Why does error 0x80070021 appear in Outlook?

How do I fix error 0x80070021?

1. Check if Outlook is running

2. Uninstall MS Office Communicator

After doing that, check if error 0x80070021 is gone.

3. Clean Boot Windows

After doing that, check if error 0x80070021 in Outlook is gone.

4. Restart Windows in Safe Mode

Once you enter safe mode, check if error 0x80070021 still appears.

5. Remove Outlook’s Search Email Indexer add-in

Those are some of the confirmed resolutions forerror0x80070021 that have fixed the issue forOutlookusers.

So, the resolutions above will usually fix theerror. Aside from those fixes, rollingWindows 10back to a restore point might also resolve the issue.

We also have to mention that there are many other issues that you can encounter, such asOutlook not sending emails, but we covered that one in a separate guide.

Let us know what troubleshooting steps you used to fix thisOutlookissue. Do so by leaving us a message in the comments section below.

Outlook Error 0x80070021: How to Get Rid of it#

Why does error 0x80070021 appear in Outlook?#

How do I fix error 0x80070021?#

1. Check if Outlook is running#

2. Uninstall MS Office Communicator#

3. Clean Boot Windows#

4. Restart Windows in Safe Mode#

5. Remove Outlook’s Search Email Indexer add-in#