Fixing Time Errors on VMware vSphere and ESX Hosts
Time synchronization across a Windows domain is very important. If a member server's clock varies more than 5 minutes from other domain servers, Kerberos tickets will fail. This causes random authentication errors for users and/or applications which
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Read the complete post at http://www.expta.com/2011/07/fixing-time-errors-on-vmware-vsphere.html