
8hhiy (8hhiy) asked a question.
Step1: Enter the URL in to browser WWW.something.com --> User Able to get the Okta Authentication provider He has entered the UserName and password. After OKTA , He has to access the SharePoint site. But here the problem is User Faced the error you don't have access to site . Even though he proper privilege's .
Before we have the SharePoint Ad It was working fine. After config OKTA it is not.

This is Robert from Okta support.
We can't say what the problem is until we investigate the issue in a more detailed manner.
I recommend having a look over the following article that provides troubleshooting information regarding SharePoint on-prem:
https://help.okta.com/en/prod/Content/Topics/DeploymentGuides/Sharepoint/Guide/Appendices/troubleshooting.htm
If this doesn't work for you, please open a support ticket from the okta portal https://support.okta.com, in order to have a closer look over the problem.