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Auto Reply Issue with Report A Message Addon

No Thanks 101 Reputation points
2021-02-13T21:53:45.953+00:00

Recently implemented the "Report A Message" addon across an o365 environment (both web and full Office clients). Also added a mail flow rule to BCC outbound messages to our SOC's shared mailbox when the button is used. (Links below)

Normally our SOC auto-replies to any messages sent in as a courtesy to end users. During usage we've noticed that any messages reported using the addon cannot be auto-replied to.

Has anyone else noticed this behavior and if so have they been able to find a solution?

https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/enable-the-report-message-add-in?view=o365-worldwide

https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/use-mail-flow-rules-to-see-what-your-users-are-reporting-to-microsoft?view=o365-worldwide

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  1. No Thanks 101 Reputation points
    2021-03-13T20:08:16.46+00:00

    Wanted to follow up on this post. We were able to figure a way to make this work using the native "Custom Mailbox" feature user-submission mailbox that's part of the User Submission/Report a Message button function.

    Designating our shared mailbox there and disabling the CC mail transport rule recommended in other MS guidance, allows auto-replies to the button submissions to work as intended.

    Hope this helps others

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  1. Andy David - MVP 153.5K Reputation points MVP
    2021-02-13T22:01:51.557+00:00

    Auto-replies are suppressed by Exchange system messages like that to prevent mail loops. Its never good to auto-reply actually :)
    If you look at the headers of one those messages sent via the Add-on, you will see that its in the header not to auto-reply and really, thats a good thing.

    Should be something like:
    "X-Auto-Response-Suppress: OOF, DR, RN, NRN"

    https://learn.microsoft.com/en-us/openspecs/exchange_server_protocols/ms-oxcmail/ced68690-498a-4567-9d14-5c01f974d8b1

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  2. No Thanks 101 Reputation points
    2021-02-13T23:54:42.763+00:00

    Andy;

    Thanks for the reply. We're aware of the potential mail loops that auto replies can create. We use then at the request of management for customer service purposes

    We have examined the headers on the Report Message emails and they do contain an X-Auto-Response-Suppress value of "-4", which doesn't appear to adhere to the normal values... However even if this header is stripped using the transport/mail flow rule, auto replies still don't function.

  3. Xzsssss 8,886 Reputation points Microsoft External Staff
    2021-02-15T06:47:09.38+00:00

    Hi @No Thanks ,

    Agree with Andy, and i did the same test and got the same result.

    Also i think you could check the report in user submissions:
    Microsoft 365 Admin Center -> Security -> Submissions -> User Submissions.
    View user submissions to Microsoft

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