This article will show you step-by-step instructions to build your own NTP CentOS server. The network diagram shows the best practice to setup the NTP server farm for redundancy. This article also serves as your NTP server documentation.
Teach the user how to join ESXi hosts to Active Directory domains
Open vSphere Client: Join ESXi host to AD domain: Verify ESXi computer account in AD: Configure permissions for domain user in ESXi: Test domain user login to ESXi host: