
User17218062042626067917 (Customer) asked a question.
I tried installing the Okta AD Agent v3.18.0 but ran into the problems as seen in the picture below. I followed the documentation to the letter when setting up the server and the install would also complain about the OktaService account not being a member of Pre Windows 2000 Access group.
But the service account is added to the Access group and the domain admin group. I have even tried to install the agent by login to the server using the Okta service account. No luck. Add the AES-128 and AES-256 options for the account in AD user settings and still unable to install. Delegated control of the domain with the specific permissions and still not able to install the agent.

Hi @User17218062042626067917 (Customer) , Thank you for reaching out to the Okta Community!
The new AD agent version 3.18.0 has a few changes, mainly what I think is causing your issue is the new OAuth 2.0 registration flow.
You need to make sure to leverage a SuperAdmin account or an admin account that has the new role that manages Agents and Agent registration.
Please view the following articles for details:
AD Agent Changes Using OAuth 2.0
Okta AD Agent Registration Using OAuth 2.0
"Okta Agent Registration" Application is Assigned to Admins
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