What does DCDiag fix?
The DCDiag is a Microsoft Windows diagnostics command-line tool for domain controller health checks and troubleshooting. With the DCDiag, you can run about 30 different health checks on a domain controller and test DNS settings, replication health, errors, and more.
How do I resolve DNS issues?
8 Strategies for Troubleshooting a DNS Failure
- Restart Your Software or Device. Sometimes simply exiting the browser completely for a few minutes will solve the problem.
- Restart the Modem or Router.
- Switch Browsers.
- Pause Your Firewall.
- Clear Your Cache.
- Disable Extra Connections.
- Keep Everything Updated.
- Check DNS Settings.
How do I fix DNS on my domain controller?
Method 1: Fix DNS errors
- At a command prompt, run the netdiag -v command. This command creates a Netdiag.
- Resolve any DNS errors in the Netdiag. log file before you continue.
- Make sure that DNS is configured correctly.
How can I tell if Active Directory is functioning correctly?
The best way to verify the operation of Active Directory is to run the console utility Dcdiag (Domain Controller Diagnosis). Dcdiag executes several tests to verify that AD is working correctly. If Dcdiag reports a failed test you will need to troubleshoot your domain controller to find the cause.
What does reloading a DNS zone do?
Refresh means renewing the timestamp of a record in DNS server, if the record owner still connected to the network while using the same hostname and IP address combination. A Windows machine will by default refresh the timestamp for its own record in the DNS server every 24 hours.
How do you check AD replication and fix replication issues?
Use either of the following methods to view replications errors:
- Download and run the Microsoft Support and Recovery Assistant tool OR Run AD Status Replication Tool on the DCs.
- Read the replication status in the repadmin /showrepl output. Repadmin is part of Remote Server Administrator Tools (RSAT).