If you are trying to connect to server console in Hyper-V Server and SCVMM2008 asking for credentials every time, and you receive the following error message “Your system administrator does no allow the use of saved credentials to log on to the remote computer <computername> because its identity is not fully verified. Please enter new credentials. “ or  "No authority could be contacted for authentication"

You need to install http://support.microsoft.com/kb/939820/en-us?sd=gn hot-fix on all Domain Controllers in site

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