diff --git a/spring-security-kerberos-samples/sec-server-win-auth/src/main/java/demo/app/ActiveDirectoryLdapAuthoritiesPopulator.java b/spring-security-kerberos-samples/sec-server-win-auth/src/main/java/demo/app/ActiveDirectoryLdapAuthoritiesPopulator.java
new file mode 100644
index 0000000..eefa6eb
--- /dev/null
+++ b/spring-security-kerberos-samples/sec-server-win-auth/src/main/java/demo/app/ActiveDirectoryLdapAuthoritiesPopulator.java
@@ -0,0 +1,34 @@
+package demo.app;
+
+import org.springframework.ldap.core.DirContextOperations;
+import org.springframework.ldap.core.DistinguishedName;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.authority.AuthorityUtils;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
+import org.springframework.security.ldap.userdetails.LdapAuthoritiesPopulator;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+public class ActiveDirectoryLdapAuthoritiesPopulator implements LdapAuthoritiesPopulator {
+
+    @Override
+    public Collection<? extends GrantedAuthority> getGrantedAuthorities(DirContextOperations userData, String username) {
+        String[] groups = userData.getStringAttributes("memberOf");
+
+        if (groups == null) {
+            return AuthorityUtils.NO_AUTHORITIES;
+        }
+
+        ArrayList<GrantedAuthority> authorities = new ArrayList<GrantedAuthority>(
+                groups.length);
+
+        for (String group : groups) {
+            authorities.add(new SimpleGrantedAuthority(new DistinguishedName(group)
+                    .removeLast().getValue()));
+        }
+
+        return authorities;
+    }
+
+}
diff --git a/spring-security-kerberos-samples/sec-server-win-auth/src/main/java/demo/app/WebSecurityConfig.java b/spring-security-kerberos-samples/sec-server-win-auth/src/main/java/demo/app/WebSecurityConfig.java
index 5f588e1..240209b 100644
--- a/spring-security-kerberos-samples/sec-server-win-auth/src/main/java/demo/app/WebSecurityConfig.java
+++ b/spring-security-kerberos-samples/sec-server-win-auth/src/main/java/demo/app/WebSecurityConfig.java
@@ -90,7 +90,7 @@ public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
 	}
 
 	@Bean
-	public KerberosServiceAuthenticationProvider kerberosServiceAuthenticationProvider() {
+	public KerberosServiceAuthenticationProvider kerberosServiceAuthenticationProvider() throws Exception {
 		KerberosServiceAuthenticationProvider provider = new KerberosServiceAuthenticationProvider();
 		provider.setTicketValidator(sunJaasKerberosTicketValidator());
 		provider.setUserDetailsService(ldapUserDetailsService());
@@ -107,29 +107,35 @@ public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
 	}
 
 	@Bean
-	public KerberosLdapContextSource kerberosLdapContextSource() {
+	public KerberosLdapContextSource kerberosLdapContextSource() throws Exception {
 		KerberosLdapContextSource contextSource = new KerberosLdapContextSource(adServer);
 		contextSource.setLoginConfig(loginConfig());
 		return contextSource;
 	}
 
-	@Bean
-	public SunJaasKrb5LoginConfig loginConfig() {
+	public SunJaasKrb5LoginConfig loginConfig() throws Exception {
 		SunJaasKrb5LoginConfig loginConfig = new SunJaasKrb5LoginConfig();
 		loginConfig.setKeyTabLocation(new FileSystemResource(keytabLocation));
 		loginConfig.setServicePrincipal(servicePrincipal);
 		loginConfig.setDebug(true);
 		loginConfig.setIsInitiator(true);
+		loginConfig.afterPropertiesSet();
 		return loginConfig;
 	}
 
 	@Bean
-	public LdapUserDetailsService ldapUserDetailsService() {
+	public LdapUserDetailsService ldapUserDetailsService() throws Exception {
 		FilterBasedLdapUserSearch userSearch =
 				new FilterBasedLdapUserSearch(ldapSearchBase, ldapSearchFilter, kerberosLdapContextSource());
-		LdapUserDetailsService service = new LdapUserDetailsService(userSearch);
+		LdapUserDetailsService service =
+				new LdapUserDetailsService(userSearch, new ActiveDirectoryLdapAuthoritiesPopulator());
 		service.setUserDetailsMapper(new LdapUserDetailsMapper());
 		return service;
 	}
 
+	@Bean
+	@Override
+	public AuthenticationManager authenticationManagerBean() throws Exception {
+		return super.authenticationManagerBean();
+	}
 }