diff --git a/app/assets/stylesheets/forms.css.scss b/app/assets/stylesheets/forms.css.scss
index 69c1722c..c94a27e1 100644
--- a/app/assets/stylesheets/forms.css.scss
+++ b/app/assets/stylesheets/forms.css.scss
@@ -12,8 +12,12 @@
 }
 
 .filter-form {
-  .form-group:not(:last-child) {
-    margin-right: 1em;
+  .form-group {
+    margin-bottom: 1em;
+
+    &:not(:last-child) {
+      margin-right: 1em;
+    }
   }
 
   input, select {
diff --git a/app/controllers/external_users_controller.rb b/app/controllers/external_users_controller.rb
index 091c6716..537631f6 100644
--- a/app/controllers/external_users_controller.rb
+++ b/app/controllers/external_users_controller.rb
@@ -5,7 +5,8 @@ class ExternalUsersController < ApplicationController
   private :authorize!
 
   def index
-    @users = ExternalUser.all.includes(:consumer).paginate(page: params[:page])
+    @search = ExternalUser.ransack(params[:q])
+    @users = @search.result.includes(:consumer).paginate(page: params[:page])
     authorize!
   end
 
diff --git a/app/models/consumer.rb b/app/models/consumer.rb
index 0cefe9ec..dcb06c0c 100644
--- a/app/models/consumer.rb
+++ b/app/models/consumer.rb
@@ -2,6 +2,7 @@ class Consumer < ApplicationRecord
   has_many :users
 
   scope :with_internal_users, -> { where('id IN (SELECT DISTINCT consumer_id FROM internal_users)') }
+  scope :with_external_users, -> { where('id IN (SELECT DISTINCT consumer_id FROM external_users)') }
   scope :with_study_groups, -> { where('id IN (SELECT DISTINCT consumer_id FROM study_groups)') }
 
   validates :name, presence: true
diff --git a/app/models/user.rb b/app/models/user.rb
index 686456f4..73b21fe0 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1,7 +1,7 @@
 class User < ApplicationRecord
   self.abstract_class = true
 
-  ROLES = %w(admin teacher)
+  ROLES = %w(admin teacher learner)
 
   belongs_to :consumer
   has_many :study_group_memberships, as: :user
diff --git a/app/views/external_users/index.html.slim b/app/views/external_users/index.html.slim
index b9450323..93a3e234 100644
--- a/app/views/external_users/index.html.slim
+++ b/app/views/external_users/index.html.slim
@@ -1,5 +1,23 @@
 h1 = ExternalUser.model_name.human(count: 2)
 
+= render(layout: 'shared/form_filters') do |f|
+  .row.px-3
+    .form-group
+      = f.label(:name_cont, t('activerecord.attributes.external_user.name'), class: 'sr-only')
+      = f.search_field(:name_cont, class: 'form-control', placeholder: t('activerecord.attributes.external_user.name'))
+    .form-group
+      = f.label(:email_cont, t('activerecord.attributes.external_user.email'), class: 'sr-only')
+      = f.search_field(:email_cont, class: 'form-control', placeholder: t('activerecord.attributes.external_user.email'))
+    .form-group
+      = f.label(:external_id_cont, t('activerecord.attributes.external_user.external_id'), class: 'sr-only')
+      = f.search_field(:external_id_cont, class: 'form-control', placeholder: t('activerecord.attributes.external_user.external_id'))
+  .row.px-3
+    .form-group
+      = f.label(:role_eq, t('activerecord.attributes.external_user.role'), class: 'sr-only')
+      = f.select(:role_eq, User::ROLES.map { |role| [t("users.roles.#{role}"), role] }, { include_blank: true }, class: 'form-control', prompt: t('activerecord.attributes.external_user.role'))
+    .form-group
+      = f.label(:consumer_id_eq, t('activerecord.attributes.external_user.consumer'), class: 'sr-only')
+      = f.collection_select(:consumer_id_eq, Consumer.with_external_users, :id, :name, class: 'form-control', prompt: t('activerecord.attributes.external_user.consumer'))
 .table-responsive
   table.table
     thead
diff --git a/app/views/external_users/show.html.slim b/app/views/external_users/show.html.slim
index de7f12fa..b3f72d6c 100644
--- a/app/views/external_users/show.html.slim
+++ b/app/views/external_users/show.html.slim
@@ -2,6 +2,9 @@ h1 = @user.displayname
 
 = row(label: 'external_user.name', value: @user.name)
 = row(label: 'external_user.email', value: @user.email)
+= row(label: 'external_user.external_id') do
+  code
+    = @user.external_id
 = row(label: 'external_user.consumer', value: link_to(@user.consumer, @user.consumer))
 = row(label: 'external_user.role', value: t("users.roles.#{@user.role}"))
 
diff --git a/app/views/shared/_form_filters.html.slim b/app/views/shared/_form_filters.html.slim
index 2026ae21..3a3afb90 100644
--- a/app/views/shared/_form_filters.html.slim
+++ b/app/views/shared/_form_filters.html.slim
@@ -1,9 +1,11 @@
-.card.card-body.bg-light
-  = search_form_for(@search, class: 'clearfix filter-form form-inline') do |f|
-    = yield(f)
-    .btn-group.ml-auto
-      button.btn.btn-primary type='submit' = t('shared.apply_filters')
-      button.btn.btn-primary.dropdown-toggle data-toggle='dropdown' type='button'
-      ul.dropdown-menu role='menu'
-        li
-          a.dropdown-item href=request.path = t('shared.reset_filters')
+.card.card-body.bg-light.flex-row.container.row.mx-0
+  = search_form_for(@search, class: 'clearfix filter-form form-inline w-100') do |f|
+    .col-sm.p-0
+      = yield(f)
+    .col-sm-auto.p-0
+      .btn-group.ml-auto
+        button.btn.btn-primary type='submit' = t('shared.apply_filters')
+        button.btn.btn-primary.dropdown-toggle data-toggle='dropdown' type='button'
+        ul.dropdown-menu role='menu'
+          li
+            a.dropdown-item href=request.path = t('shared.reset_filters')
diff --git a/config/locales/de.yml b/config/locales/de.yml
index 6b344365..fe46d474 100644
--- a/config/locales/de.yml
+++ b/config/locales/de.yml
@@ -52,6 +52,7 @@ de:
       external_user:
         consumer: Konsument
         email: E-Mail
+        external_id: Externe ID
         name: Name
         role: Rolle
       file:
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 5547386d..a1e88e77 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -52,6 +52,7 @@ en:
       external_user:
         consumer: Consumer
         email: Email
+        external_id: External ID
         name: Name
         role: Role
       file: