In order for you to accomplish AD on OCI, several assumptions are made:

Oracle Cloud Infrastructure can help you build and extend your current Active Directory Forest.

Configuring the Domain Controllers

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Install the Active Directory Domain Services Role:

Note: If you selected to install the DNS Server role, you will get a warning dialog box informing you that no static IP addresses were found on the computer. Because the IP address associated with this instance will be associated with it for the life of the instance, you can click the Continue button.

Repeat the steps above for the second domain controller.

Configure DNS

Reconfigure the DNS server to point to the on-premises Active Directory DNS server to promote the domain controller.

Prerequisites:

Configure the on-premises DNS server:

Join the domain

Now that the DNS server is configured on your instance, you can join the domain.

Prerequisites:

Steps:

Promote the Domain Controller

Prerequisites:

Promote the server to a read-only domain controller:

Testing Active Directory

Your Oracle Cloud Infrastructure tenancy should now have two read-only domain controllers and you can now test if these domain controllers can be used to both join the domain from the tenancy, and log in to your servers using the domain credentials.

Configure the test instance to use the newly created domain controllers as the DNS server:

Next, you can join the test server to the domain:

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