FIXED 3/4/16: Problems with POP accounts in Outlook 2016: Email is deleted from server or duplicated in Inbox

UPDATE - 3/9/16


Hi everyone,

We're locking this discussion thread, which has grown too large to be manageable; we are concerned that potential issues are getting lost in the comments.

If you haven't already, please follow the steps in KB 3145116 to update your copy of Office. If you still have trouble after that, verify that the update installed correctly (you should be on version 16.0.6568.2036). Keep in mind that after applying the update, emails may be duplicated one last time - but this should only be a one-time thing, if it happens at all. The KB article provides steps on how to remove those duplicates under the More Information section of the article.

If you've done all of the above and are still seeing duplicate emails or server deletion issues, we ask that you start a new thread in the Outlook 2016 forum so we can follow up with you individually. To do that, click Participate > Ask a Question at the top of this page. The more detail you can provide in the new thread, the better (symptom you're seeing, version of Outlook 2016 you're on, etc.)

Thank you.

UPDATE - 3/4/16


Hi everyone,

We’re in the process of rolling out an Office update now (version 16.0.6568.2036), which will fix the following POP3 bugs:

  • After Outlook downloads your email, all the email messages on the server are deleted from the Inbox.
  • Email messages are downloaded multiple times in Outlook, causing duplicate items.

To get the update immediately, open Outlook 2016, and then click File > Office Account > Update Options > Update Now.

Note  After the update, Outlook may download all email one final time, which isn't ideal, but may be necessary to fully fix things. If this occurs and email is duplicated in your Inbox, you can use the method described in the "More Information" section in this article (KB 3145116) to remove the duplicates.



We want to let you know about issues we're seeing with Outlook 2016 and POP3 accounts. If you have the most recent Office 365 update installed (version 16.0.6568.2025), your emails may get deleted from the server or you may receive duplicate emails in your inbox.

The Outlook team is aware of the problem and actively investigating the issues. We'll update this post and KB 3145116 as more information becomes available. You can click on the Subscribe button at the bottom of this page to receive notifications whenever this post is updated.

For now, please try workaround steps provided in this article (KB 3145116):

  • Configuring your email account to use IMAP settings instead of POP3 (only if your email provider supports this).
  • Reverting to an earlier version of Office 2016 via uninstall of latest update.

IMPORTANT If you disabled the "Remove from server after <x> days" option in Outlook 2016 to fix the delete email issue you're probably now getting duplicate emails in your inbox. To avoid both problems, please re-enable the "Remove from server" option and use one of the other workarounds listed in the KB article.

Thanks for your patience in this matter. We are treating this issue with the highest priority as we work to fix the problem.

* Please try a lower page number.

* Please enter only numbers.

* Please try a lower page number.

* Please enter only numbers.


I'm seeing the same issue with build 16.0.6001.1061. I don't think reverting to build 16.0.6366.2062 will help.

What am I missing?


Build 16.0.6366.2068 works perfect for me.

I originally reported the problem with 16.0.6528.1011.

I think the problem first appeared when the "Black" theme was added.

My Outlook now says it is 16.0.6568.2025.

Please advise what previous version to revert to.

Also, when might we expect a new version?


Also, need options for reverting...I tried the command prompt. Did not work for me. Got message "program couldn't run on my computer."

Also,I installed after the update.

Solution and previous version to revert to.
Go first in Word or Outlook to account and on the right site you can disable the automatic updates.
(Otherwise the update installs again.)
start Command as administrator:
cd C:\Program Files\Common Files\microsoft shared\ClickToRun
officec2rclient.exe /update user updatetoversion=16.0.6366.2068

I tried

officec2rclient.exe /update user updatetoversion=16.0.6366.2068

and got:

I got the same error all the way back to 16.0.6001.1043 using the build numbers off of Office 365 Version Numbers

It looks like 16.0.6001.1043 doesn't have this problem so I'm sticking with it for now.

On my laptop computer I disabled updates and reverted to 16.0.6366.2062 and the problem no longer exists. However I have no way of knowing when it will be safe to resume updates again.

On the desktop, a different story. I had over 22,000 messages in my inbox and it continued to download them hundreds at a time whenever I started Outlook.

  • I disabled updates and reverted to 16.0.6366.2068. That did not resolve the problem.
  • Then I ran scanpst.exe on the inbox twice. Each time it reported errors and I repaired them.
  • I ran scanpst.exe a third time. This time it said there were only minor inconsistencies and the repair button wasn't shown.
  • However, the problem persists on the desktop machine.

Has Outlook hosed my Inbox beyond repair? What can be done? I have work to do. Right now I'm dead in the water on my desktop.

I must leave messages on the server. Disabling that and/or moving to IMAP are not options.

Since the laptop is now working, could I move the Inbox pst file from the laptop to the desktop and use it as my new inbox? Could that fix the problem? Or would it further hose things up? (Though I imagine it would be hard to hose things up more than MS has already done!)

So what can I do to get my system running again? Why won't scanpst.exe fix it?

[P.S. I hope MS doesn't underestimate the amount of irritation and even anger this lack of basic QA has caused on what should be a reliable product. I've wasted hours trying to fix MS's damage, all to no avail. How can we get the message to MS that there are massive customer relations and PR problems from rolling out a release that's not been thoroughly tested?]

 I am trying to use the above information and each time I add the "officec2rclient.exe /update user updatetoversion=16.0.6366.2068" after I have entered the first part of the command, it just reverts back to the first part...  Doesn't state that it has reverted..  I am I missing something

C:\Program Files\Common Files\microsoft shared\ClickToRun>
C:\Program Files\Common Files\microsoft shared\ClickToRun>officec2rclient.exe /update user updatetoversion=16.0.6366.2068

C:\Program Files\Common Files\microsoft shared\ClickToRun>officec2rclient.exe /update user updatetoversion=16.0.6366.2068

C:\Program Files\Common Files\microsoft shared\ClickToRun>cd/

C:\>cd C:\Program Files\Common Files\microsoft shared\ClickToRun

C:\Program Files\Common Files\microsoft shared\ClickToRun> officec2rclient.exe /update user updatetoversion=16.0.6366.2068

C:\Program Files\Common Files\microsoft shared\ClickToRun>

It appears that I finally got it to work... thanks..

The installer was quiet when it finally made the update for me. That is, it just closed without the usual, "Office is ready" message.

Open Word or Programs and Features and look at the version for Office to check. I did this and the new version is there.

I'm at a loss otherwise.

* Please try a lower page number.

* Please enter only numbers.

* Please try a lower page number.

* Please enter only numbers.


Discussion Info

Last updated October 19, 2020 Views 45,505 Applies to: