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    Hi  experts i am using exchange hybrid environment.

    one of the external user. abc@gmail.com has sent an email to my office365 user. i can see that the mail has hit the email gateway. the email is genuine, i can also see that email is routed to edge transport server on email gateway but the office365 user did not receive the email. i am not sure how to troubleshoot, where to look

    Wednesday, November 14, 2018 6:20 PM

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    Hi.

    Please check quarantine and mail flow -message trace on Office 365 Exchange admin center

    Troubleshoot Office 365 mail flow

    Exchange 2010 mailflow troubleshooting guide

    What's error on SMTP log on your GW?

    MCITP, MCSE. Regards, Oleg

    • Edited by Oleg.Kovalenko Wednesday, November 14, 2018 7:44 PM
    • Proposed as answer by Niko.Cheng Thursday, November 15, 2018 8:29 AM
    • Marked as answer by Risingflight Saturday, November 24, 2018 8:03 AM
    Wednesday, November 14, 2018 6:23 PM
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    • Make sure that the Office 365 mailbox is represented as a remote mailbox in on-premises Exchange. 
    • Make sure that the RemoteRoutingAddress property has an address of the form something@tenantname.mail.onmicrosoft.com. 
    • Make sure that same address exists as an E-mail address in EmailAddresses.

    Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."
    Celebrating 20 years of providing Exchange peer support!

    • Proposed as answer by Niko.Cheng Thursday, November 15, 2018 8:29 AM
    • Marked as answer by Risingflight Saturday, November 24, 2018 8:06 AM
    Wednesday, November 14, 2018 7:29 PM

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  • Question
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    Hi.

    Please check quarantine and mail flow -message trace on Office 365 Exchange admin center

    Troubleshoot Office 365 mail flow

    Exchange 2010 mailflow troubleshooting guide

    What's error on SMTP log on your GW?

    MCITP, MCSE. Regards, Oleg

    • Edited by Oleg.Kovalenko Wednesday, November 14, 2018 7:44 PM
    • Proposed as answer by Niko.Cheng Thursday, November 15, 2018 8:29 AM
    • Marked as answer by Risingflight Saturday, November 24, 2018 8:03 AM
    Wednesday, November 14, 2018 6:23 PM
  • Question
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    • Make sure that the Office 365 mailbox is represented as a remote mailbox in on-premises Exchange. 
    • Make sure that the RemoteRoutingAddress property has an address of the form something@tenantname.mail.onmicrosoft.com. 
    • Make sure that same address exists as an E-mail address in EmailAddresses.

    Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."
    Celebrating 20 years of providing Exchange peer support!

    • Proposed as answer by Niko.Cheng Thursday, November 15, 2018 8:29 AM
    • Marked as answer by Risingflight Saturday, November 24, 2018 8:06 AM
    Wednesday, November 14, 2018 7:29 PM
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    Hi Risingflight,

    Agree with above suggestions.

    First, you need to confirm with sender that whether gets a NDR message. If yes, let the sender send the NDR message to you, and post it here.

    If no NDR, please check message trace & quarantine in your office 365, details see:

    Message trace in the Office 365 Security & Compliance Center

    Manage quarantined messages and files as an administrator in Office 365

    Best Regards,
    Niko Cheng

    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 Niko.Cheng Friday, November 16, 2018 9:06 AM
    Thursday, November 15, 2018 8:36 AM
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    Hi ,

    I'm just writing to check how's everything going? If you have any questions or needed further help on this issue, please feel free to post back. If the issue has been resolved, please mark the helpful replies as answers, this will make answer searching in the forum easier and be beneficial to other community members as well. Thanks for your understanding.

    Best Regards,
    Niko Cheng

    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 Niko.Cheng Friday, November 23, 2018 2:18 AM
    Wednesday, November 21, 2018 8:24 AM