Weblogic - Security Realm

Two authentication provider  control flags :

• Requisite
• Sufficient
• Required
• Optional

• REQUIRED—The Authentication provider is always called, and the user must always pass its authentication test. Regardless of whether authentication succeeds or fails, authentication still continues down the list of providers.
• REQUISITE—The user is required to pass the authentication test of this Authentication provider. If the user passes the authentication test of this Authentication provider, subsequent providers are executed but can fail (except for Authentication providers with the JAAS Control Flag set to REQUIRED).
• SUFFICIENT—The user is not required to pass the authentication test of the Authentication provider. If authentication succeeds, no subsequent Authentication providers are executed. If authentication fails, authentication continues down the list of providers.
• OPTIONAL—The user is allowed to pass or fail the authentication test of this Authentication provider. However, if all Authentication providers configured in a security realm have the JAAS Control Flag set to OPTIONAL, the user must pass the authentication test of one of the configured providers.

Save your changes and Activate it. You need to restart all the server. To test it login to weblogic console and then navigate to Providers -> Users and Groups. You will find users from your Active Directory. To check particular user you can click on Customize this table option and add Name of user in Criteria

Source - 

https://insideclouldworld.wordpress.com/2016/08/21/configure-active-directory-with-weblogic-server-as-authentication-provider/

https://docs.oracle.com/cd/E24329_01/web.1211/e24422/atn.htm#SECMG169