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Target host responded with Error. 535 5.7.3 Authentication Unsuccessful. RRS feed

Answers

  • Finally the problem is resolved. Yup. 

    1. One of our AD server was not synced with the NTP. The Time difference of our Two Exchange Server was 7 minutes with primary domain controller (PDC). After the NTP Syncing resolve with PDC, the Exchange Error is solved and mail communication becomes smooth and working properly.
    Tuesday, April 23, 2019 4:47 AM

All replies

  • Hi,

    When this issue occur? Does it occurs when you use a custom connector?

    From this thread, we can know this issue is related with a missing permission group on the connector your used, try to add "Exchange Users" to the "Permission Group".

    Regards,

    Kyle Xu


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

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    Friday, April 19, 2019 7:36 AM
    Moderator
  • Hi.

     I think its not bcoz of Custom Connector permission. The permission is given in Default Frontend receive connector. The servers are in DAG environment. When we restart the server, then mail communication become ok and works fine for 5-6 hours. After that problems remain same.

    Saturday, April 20, 2019 8:25 AM
  • Finally the problem is resolved. Yup. 

    1. One of our AD server was not synced with the NTP. The Time difference of our Two Exchange Server was 7 minutes with primary domain controller (PDC). After the NTP Syncing resolve with PDC, the Exchange Error is solved and mail communication becomes smooth and working properly.
    Tuesday, April 23, 2019 4:47 AM
  • Thanks for you sharing, it will be useful to other people to narrow down the similar issue.

    Regards,

    Kyle Xu


    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.

    Wednesday, April 24, 2019 7:19 AM
    Moderator