Monday, 12 August 2013

Local Security Authority problem

Ever tried to log in to your remote computer, only to see this error message?
An authentication error has occurred. The Local Security Authority cannot be contacted.

I have my Azure Virtual Machine configured in domain. The Domain Controller and DNS is also an Azure VM. I'm trying to log in with my domain credentials. This error means, that the remote machine cannot access domain controller.
This error often occurs (or rather always and only) after I restarted VM - e.g. to change number of cores or memory.


1. Log in to VM using local user, not domain one.
2. Open network and sharing center.
3. Click "Change adapter settings". As you can see, Windows cannot identify your domain.
4. Right-click network card icon, open Properties, double-click "Internet Protocol Version 4".
5. DNS server address disappeared. Set it again.
6. Now, you're back in domain. Log out and log in with domain credentials.

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