Configure the server type to NTP by running regedit, and go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters. Make sure Type is NTP.
2. Set AnnounceFlags to 0x5 or 9xA in subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config
If an authoritative time server that is configured
to use an AnnounceFlag value
of 0x5 does not synchronize with an upstream time server, a
client server may not correctly synchronize with the authoritative time server
when the time synchronization between the authoritative time server and the
upstream time server resumes. Therefore, if you have a poor network connection
or other concerns that may cause time synchronization failure of the
authoritative server to an upstream server, set the AnnounceFlag value to 0xA instead of
to 0x5.
If an authoritative time server that is
configured to use an AnnounceFlag value
of 0x5 and to synchronize with an upstream time server at a
fixed interval that is specified in SpecialPollInterval, a client server may not correctly synchronize with the authoritative
time server after the authoritative time server restarts. Therefore, if you
configure your authoritative time server to synchronize with an upstream NTP
server at a fixed interval that is specified in SpecialPollInterval, set the AnnounceFlag value to 0xA instead
of 0x5.
Configure time services for a DC running on a VM is different from physical server. Assuming the VM/DC time sync from the host machine is turned on in the Integration Services, please follow these steps.
On your Domain Controller add the following registry key:
Interactive ESXi Installation which is recommended for small deployments of fewer than five hosts. You boot the installer from a CD or DVD, a bootable USB device, or by PXE booting the installer from a location on the network. Then follow the prompts in the installation wizard to install ESXi to disk.
Scripted ESXi Installation which is an efficient way to deploy multiple ESXi hosts with an unattended installation. To configure multiple hosts with the same settings, create an installation script contains the host configuration settings. The installation script must be stored in a location that the host can access by HTTP, HTTPS, FTP, NFS, CDROM, or USB.
vSphere Auto Deploy ESXi Installation which is for vSphere 5.x and later provide several ways to install ESXi with vSphere Auto Deploy. vSphere Auto Deploy can provision hundreds of physical hosts with ESXi software. vCenter Server makes ESXi updates and patches available for download in the form of an image profile. The host configuration is provided in the form of a host profile. You can create host profiles by using the vSphere Client. You can create custom image profiles by using vSphere ESXi Image Builder.