Reply All does not work showing "The operation failed" error

Anonymous
2022-02-06T18:14:06+00:00

Using Microsoft Outlook version 2201 (Preview Channel) I get the same error on two different computers when I use Reply All:

The operation failed. The messaging interfaces have returned an unknown error. If the problem persists, restart Oulook.

I already tried to restart outlook, change profile, create another profile, but the error continues.

Creating a new profile I also created a new .OST file, so I would exclude that the issue is a corrupt file.

The error does not show when I am connected to a personal Hotmail account. The error only shows up on my work account.

Because it happens now on two different computers (desktop and notebook) it does not seem something corrupted at the PC level.

Additional note: also ReplyAll from VBA (using Outlook.MailItem) failed, in that case without showing the dialog box UI.

The Reply and Forward buttons and corresponding VBA commands work regularly.

I also monitored with Process Explorer to see whether there are errors accessing Registry or File System, but I didn't see any particular error when I click "Reply All".

In the Event Viewer I have this entry in the Microsoft Office Alerts:

Microsoft Outlook

The operation failed.  The messaging interfaces have returned an unknown error. If the problem persists, restart Outlook.

P1: 301670

P2: 16.0.14827.20186

P3: 

P4: 0x80004005

My only suspect at this point is that there is something that happens with version 2201, but I don't know how to get more details about the error to investigate deeper. Any help would be welcome.

Outlook | Windows | Classic Outlook for Windows | For home

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  1. Anonymous
    2022-02-22T09:18:55+00:00

    I also confirm that creating a new Outlook profile now solves the problem.

    My attempt to do the same more than two weeks ago was not working.

    Based on the test made today:

    • A new profile works
    • Copying an existing profile does not work
    • Switching back to the old profile still does not work, just the new profile works

    I did not receive any feedback from Microsoft support yet, I still have my ticket open.

    Marco

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  2. Anonymous
    2022-02-21T14:54:22+00:00

    I have created a new profile after seeing this post and can confirm this issue has now been resolved.

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  3. Anonymous
    2022-02-21T14:44:28+00:00

    Outlook in-app support has closed my case given that creating a new Outlook profile fixed the problem. I cleaned up by deleting both Outlook profiles and the C:\Users<profile>\AppData\Local\Microsoft\Outlook directory and starting over. All appears to be well at this point.

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  4. Anonymous
    2022-02-20T23:35:13+00:00

    Gabriel, In their latest post, Outlook in-app support asked me to restart Outlook 5 times, and recheck, but that had no effect on the Reply All problem. Then they asked that I create a new Outlook profile. I did that, adding all three of the email accounts that I normally use, and that did fix the problem. Reply All works normally in the new profile, but continues to fail in the original one. I have the three email addresses of the three accounts in the profile in the From drop-down, for both the original and the new profile. Thanks. Jeff.

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  5. Anonymous
    2022-02-19T15:25:58+00:00

    I have 10 aliases, but this does not seem a good solution because the problem depends on the device and something else, but it is not happening on all the devices: at the moment, only on one notebook and one desktop, not on another two notebooks.

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