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Sporadically Send-on-behalf instead of Send-As RRS feed

  • Question

  • Good Morning,

    we have a problem with a shared mailbox on our exchange server 2016. We have an user who has a shared mailbox automatically mapped in his outlook (full and send-as permission). Most of the time, when he is sending mails to external recipients it is just fine and he is sending as the shared mailbox, but sporadically the mail got send as "send on behalf". When this occurs the mail is on sent items, but it never leaves the exchange server and doesn't arrives the recipient. The problem occures only with this one user and only in this specific shared mailbox. Other users with this shared mailbox don't have the problem. And this one user don't have the problem within other shared mailboxes.

    We already tried the following things to fix this bug:

    - Removed the permissions on the shared mailbox, rebooted the server and adding permissios again

    - Manually removing all "send-on-behalf"-permission with the exchange powershell and adding permissions to "send-as"

    - Recreated the local outlook profile

    The problems doesn't even have a specific pattern to occur (at least we don't notice it). Do you have ideas how we can solve this easily? My next suggestion would be to recreate the whole shared mailbox, but this could cause more problems for other internal users when they try to send to this mailbox.

    Thursday, September 6, 2018 7:55 AM

Answers

  • Hi,

    How about creating a new mailbox for the problematic user?

    I mean exporting the user's mailbox content to pst, then importing content to the new created mailbox from the pst file.

    Besides, we could use MFCMAPI tool to troubleshoot Outlook issues:

    Useful tools while troubleshooting Outlook issues (3) – MFCMAPI

    Regards,

    Manu Meng


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    Click here to learn more. Visit the dedicated forum to share, explore and talk to experts about Microsoft Teams.

    • Proposed as answer by Manu Meng Monday, September 10, 2018 11:51 AM
    • Marked as answer by OliSt Wednesday, April 29, 2020 7:56 AM
    Friday, September 7, 2018 8:16 AM

All replies

  • Hi,

    How about creating a new mailbox for the problematic user?

    I mean exporting the user's mailbox content to pst, then importing content to the new created mailbox from the pst file.

    Besides, we could use MFCMAPI tool to troubleshoot Outlook issues:

    Useful tools while troubleshooting Outlook issues (3) – MFCMAPI

    Regards,

    Manu Meng


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    Click here to learn more. Visit the dedicated forum to share, explore and talk to experts about Microsoft Teams.

    • Proposed as answer by Manu Meng Monday, September 10, 2018 11:51 AM
    • Marked as answer by OliSt Wednesday, April 29, 2020 7:56 AM
    Friday, September 7, 2018 8:16 AM
  • Hi,

    Just checking in to see if above information was helpful. Please let us know if you would like further assistance.

    Regards, 

    Manu Meng


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    Click here to learn more. Visit the dedicated forum to shareexplore and talk to experts about Microsoft Teams.

    Friday, September 14, 2018 9:14 AM