Exchnage 2016 Topology Discovery Failed

Przemyslaw Wawrzyczny 46 Reputation points
2022-06-23T09:56:58.883+00:00

Hello Team,

Our Exchange 2016 server encountered an issue and we are unable to receive any emails:
I am wondering you could advice what could happened?

System:
Exchange 2016 VM

We can see following issues in the Event Viewer:
Events ID 2142
214322-image.png

Event ID 4027
214287-image.png

The following Services are not starting:

214270-image.png

There is connectivity between Domain Controllers and Exchange,
Local firewall ahs been disabled to eliminate this option (same issue with firewall off)
We have performed flush DNS on the server

Regards,
Przemek

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A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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3 answers

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  1. Przemyslaw Wawrzyczny 46 Reputation points
    2022-06-23T12:09:54.877+00:00

    Issue Resolved,

    Solution:

    Added entry SiteName REG_SZ with the correct site name to the Exchange registry
    Flushed DNS
    Registered DNS
    Rebooted

    Emails are coming,

    Thanks for Advice

    Regards,
    Przemek

    No comments

  2. Przemyslaw Wawrzyczny 46 Reputation points
    2022-06-23T11:25:45.827+00:00

    Hi Andy,

    No Firewalls between the Exchange and DCs (Both devices are on the same LAN in data centre)

    Yes it was working before, They issue started at some point this morning.

    It looks like Exchange lost domain trust (only local account works)

    We have performed update to the schema from exchange server to AD, but it failed. (it was yesterday evening)

    Regards,
    Przemek

    No comments

  3. Andy David - MVP 109.8K Reputation points Microsoft MVP
    2022-06-23T11:28:27.68+00:00

    Reboot the servers? I hate that suggestion, but unless some patch or change was made, maybe that is all is needed?