Information Technology Reference
In-Depth Information
between the guest OS and the ESXi host because Windows domain members rely on Kerberos
for authentication and Kerberos is sensitive to time differences between computers. A Windows-
based guest OS that belongs to an Active Directory domain is already coni gured with a native
time synchronization process against the domain controller in its domain that holds the PDC
Emulator operations master role. If the time on the ESXi host is different from the time on the
PDC Emulator operations master domain controller, the guest OS could end up moving outside
the 5-minute window allowed by Kerberos. When the 5-minute window is exceeded, Kerberos
will experience errors with authentication and replication.
Figure 9.19
Changing the
hardware accel-
eration feature
of a Windows
guest OS is a com-
mon and helpful
adjustment for
improving mouse
performance.
Figure 9.20
As of vSphere 5.1,
you can no longer
confi gure proper-
ties in VMware
Tools by interacting
with the icon in the
system tray.
You can take a few different approaches to managing time synchronizations in a virtual
environment. The i rst approach involves not using VMware Tools time synchronization and
relying instead on the W32Time service and a PDC Emulator with a Registry edit that coni gures
