I am getting following warning in event viewer and because of that some tiem user is not authenticate.
he Federation Service encountered an error while retrieving the federation metadata document from 'https://MyNamespace.accesscontrol.windows.net//FederationMetadata//2007-06//FederationMetadata.xml'. The monitoring for the following trusts failed:
The remote name could not be resolved: 'MyNameSpace.accesscontrol.windows.net'
Make sure federation metadata URL is accessible.
Verify your proxy server setting. For more information about how to verify your proxy server setting, see the AD FS 2.0 Troubleshooting Guide (http://go.microsoft.com/fwlink/?LinkId=182180).
I did DNS flush but still I am getting this warning.