How to setup role based authentication for LDAP users in jenkins ?
Hello @Abhijeet121 and welcome to this community. 
Setting up role-based authentication for LDAP users in Jenkins involves several steps. Role-based authentication allows you to control access to Jenkins resources based on user roles or groups.
Step 1: Install the Required Plugins Ensure that you have the following plugins installed in your Jenkins instance:
- Role-based Authorization Strategy: This plugin allows you to define roles and assign permissions to those roles.
- LDAP Plugin: This plugin enables LDAP authentication.
You can install these plugins through the Jenkins Plugin Manager.
Step 2: Configure LDAP Authentication
- Go to “Manage Jenkins” > “Security.”
- Under “Security Realm,” select “LDAP” from the dropdown.
- Configure your LDAP server settings, such as LDAP server URL, manager DN, and password. Test the connection (by clicking on the “Test LDAP settings” button) to ensure it’s working.
- Set the “Group membership” attribute in the “Advanced Server Configuration”. This attribute is used to determine which groups a user belongs to. Typically, it’s something like “memberOf” for Active Directory.
- Configure other LDAP settings as per your LDAP server setup.
- Save your LDAP configuration.
Step 3: Configure Role-Based Authorization
- Still in the “Security” page, under “Authorization,” select “Role-Based Strategy.”
And… I’ve never been farther than that, sorry. 
I guess the documentation should help you go further.