diff --git a/addons/api/addon/models/role.js b/addons/api/addon/models/role.js
index 83caa27d9..d660591c6 100644
--- a/addons/api/addon/models/role.js
+++ b/addons/api/addon/models/role.js
@@ -7,7 +7,10 @@ import GeneratedRoleModel from '../generated/models/role';
 import { attr } from '@ember-data/model';
 import { inject as service } from '@ember/service';
 import { all, resolve } from 'rsvp';
-import { TYPE_AUTH_METHOD_OIDC } from 'api/models/auth-method';
+import {
+  TYPE_AUTH_METHOD_OIDC,
+  TYPE_AUTH_METHOD_LDAP,
+} from 'api/models/auth-method';
 
 export default class RoleModel extends GeneratedRoleModel {
   // =services
@@ -134,7 +137,7 @@ export default class RoleModel extends GeneratedRoleModel {
       // Collect all auth methods.
       const authMethods = this.resourceFilterStore.queryBy(
         'auth-method',
-        { type: TYPE_AUTH_METHOD_OIDC },
+        { type: [TYPE_AUTH_METHOD_OIDC, TYPE_AUTH_METHOD_LDAP] },
         { scope_id: 'global', recursive: true }
       );
 
@@ -153,7 +156,6 @@ export default class RoleModel extends GeneratedRoleModel {
         // The result is an array of arrays of model instances (grouped by
         // auth methods), so these must be flattened.
         .then((grouped) => grouped.flat());
-
       return managedGroups;
     }
 
diff --git a/ui/admin/app/routes/scopes/scope/roles/role/add-principals.js b/ui/admin/app/routes/scopes/scope/roles/role/add-principals.js
index 7a0f7c6b4..6f960fd32 100644
--- a/ui/admin/app/routes/scopes/scope/roles/role/add-principals.js
+++ b/ui/admin/app/routes/scopes/scope/roles/role/add-principals.js
@@ -10,7 +10,10 @@ import { hash, all } from 'rsvp';
 import { loading } from 'ember-loading';
 import { notifySuccess, notifyError } from 'core/decorators/notify';
 import { resourceFilter } from 'core/decorators/resource-filter';
-import { TYPE_AUTH_METHOD_OIDC } from 'api/models/auth-method';
+import {
+  TYPE_AUTH_METHOD_OIDC,
+  TYPE_AUTH_METHOD_LDAP,
+} from 'api/models/auth-method';
 
 export default class ScopesScopeRolesRoleAddPrincipalsRoute extends Route {
   // =services
@@ -73,22 +76,25 @@ export default class ScopesScopeRolesRoleAddPrincipalsRoute extends Route {
         )
       : this.store.query('group', { scope_id: 'global', recursive: true });
     //query authmethods from all the scopes
-    const oidcAuthMethods = scopeIDs?.length
+    const authMethods = scopeIDs?.length
       ? await this.resourceFilterStore.queryBy(
           'auth-method',
-          { scope_id: scopeIDs, type: TYPE_AUTH_METHOD_OIDC },
+          {
+            scope_id: scopeIDs,
+            type: [TYPE_AUTH_METHOD_OIDC, TYPE_AUTH_METHOD_LDAP],
+          },
           { scope_id: 'global', recursive: true }
         )
       : await this.resourceFilterStore.queryBy(
           'auth-method',
-          { type: TYPE_AUTH_METHOD_OIDC },
+          { type: [TYPE_AUTH_METHOD_OIDC, TYPE_AUTH_METHOD_LDAP] },
           { scope_id: 'global', recursive: true }
         );
-    //extract oidc authMethod IDs
-    const oidcAuthMethodIDs = oidcAuthMethods.map(({ id }) => id);
+    //extract oidc and ldap authMethod IDs
+    const authMethodIDs = authMethods.map(({ id }) => id);
     //query all the managed groups for each auth method id
     const managedGroups = await all(
-      oidcAuthMethodIDs.map((auth_method_id) =>
+      authMethodIDs.map((auth_method_id) =>
         this.store.query('managed-group', { auth_method_id })
       )
     );