I am not able to figure out assigning mendix user roles for the users imported from AD using LDAP Synchronization module while importing. Please let me know how to achieve this
Have you seen the documentation on how to use the LDAP module to sync roles? It sounds like what you need to do is map Mendix user roles to LDAP user groups. Check out this documentation, and if you get stuck with this then please post at what step you are having the problem.