Domain Replication Issues

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Description:

Use the following troubleshooting steps when running into Domain Replication issues. These will sometimes happen when replacing DC’s without going through the proper replacement steps which should be the following:

  1. Add the new DC’s => Promote them.

  2. Integrate them => Configure roles and services.

  3. Take the originals offline => Keep them running side by side at least for 24 hours if possible.

NOTE: DHCP/DNS issues can usually be resolved by adding the IP as a secondary on the new servers NIC once you power the old server off.

To Resolve:

  1. On the domain controller, Run => eventvwr.msc => Check the logs regarding Active Directory. If there are errors or warnings, try the following:

  2. Type each of the commands and study their output:

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    repadmin /showrepl * /errorsonly >log.txt # see [this](https://technet.microsoft.com/en-us/library/cc770963.aspx)  
repadmin /replsummary  
repadmin /syncall

dcdiag /c /e /v /q /f:results.txt # see [this](https://technet.microsoft.com/en-us/library/cc731968.aspx)

netdiag /q /v /dcAccountEnum /l >>log.txt# see [this](https://technet.microsoft.com/en-us/library/cc731434.aspx)

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