Help! How power BI report server (on Premise) communicate with Active Directory?

Power BI Report Server (PBI RS) uses the Lightweight Directory Access Protocol (LDAP) to communicate with the local Active Directory (AD) for authentication and authorization purposes.

If you want to use LDAPS (LDAP over SSL) instead of LDAP, you will need to make changes to the configuration settings of PBI RS and your local AD. Here are the general steps:

1. Obtain a valid SSL certificate from a trusted certificate authority (CA) for your AD domain.

2. Install the SSL certificate on your AD domain controller.

3. Configure your AD domain controller to use LDAPS by modifying the LDAP server settings in the AD Domain Services configuration.

4. In PBI RS, change the connection string in the PBIRS configuration file (RSReportServer.config) to use the LDAPS protocol. This can be done by replacing "LDAP" with "LDAPS" in the connection string.

5. Restart the PBI RS service to apply the changes.

It's important to note that the above steps are just a general guide, and the exact steps may vary depending on your specific environment and the version of PBI RS you are using.

It's highly recommended to test the changes in a development environment before applying to a production environment and make sure that the certificate that you are using is valid, and the communication between the PBI RS and the AD is secure.