Event ID 27

I was getting Event ID 27 on a server. The error read:

Time Provider NtpClient: The response received from domain controller <host dns name> is missing the signature. The response may have been tampered with and will be ignored.

This sounds likes a scary message, with warnings that the response has been tampered with, but like many messages it just means that there was some glitch and the servers aren’t syncing correctly anymore. I found the solution at EventID.net, and it’s pretty simple. Just open a command prompt and run this command:

w32tm /resync /rediscover

After that the time synced correctly. Others have said that unregistering and reregistering the time service works as well.

w32tm /unregister
w32tm /register

Time syncing isn’t a vitally important issue, but computers do slip out of sync sometimes, and especially in a domain there can be consequences for getting too far ahead or behind. Good to make sure that the time service is always working correctly.


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