Add the domain and DNS information for your site to the ESXi host

1. Connect to the ESXi host using vSphere Client
2. Select the host and then the configuration tab
3. Click on DNS and Routing > Software
4. Click Properties
5. On the DNS configuration tab, enter the domain name
6. Specify the DNS server address
7. Optionally, add additional search domains with the text box Look for hosts in the following domains
8. Optionally, you may specify the default gateway on the routing tab
9. Click OK

Add an ESXi host to the Active Directory Domain

1. Connect to the ESXi host using vSphere Client
2. Select the host and then the configuration tab
3. Click on Authentication Services
4. Click Properties
5. Select the Service Type, Active Directory
6. Within the Domain Settings Frame, enter a Domain Name. Optionally, include a forward slash and a pre-configured OU to join and automatically move the ESXi host into the Organizational Unit upon joining the domain
7. Do not check Use vSphere Authentication Proxy, see section above for more details.

1. Click Join Domain
2. Enter a Domain Administrator credentials and click OK.

• If this errors check your DNS Settings are correct

Removing an ESXi host from an Active Directory Domain

1. Connect to the ESXi host or vCenter using vSphere Client
2. Select the host and then the configuration tab
3. Click on Authentication Services
4. Click Properties
5. Click Leave Domain
6. Click OK, OK
7. If you are in a hurry, delete the computer from Active Directory associated with your ESXi host