diff --git a/app/policies/controllers/postmaster_filters_controller_policy.rb b/app/policies/controllers/postmaster_filters_controller_policy.rb
index 633fa26aa..8f9c6a579 100644
--- a/app/policies/controllers/postmaster_filters_controller_policy.rb
+++ b/app/policies/controllers/postmaster_filters_controller_policy.rb
@@ -1,5 +1,5 @@
 # Copyright (C) 2012-2021 Zammad Foundation, http://zammad-foundation.org/
 
 class Controllers::PostmasterFiltersControllerPolicy < Controllers::ApplicationControllerPolicy
-  default_permit!('admin.channel_email')
+  default_permit!(['admin.channel_email', 'admin.channel_google', 'admin.channel_microsoft365'])
 end
diff --git a/app/policies/controllers/signatures_controller_policy.rb b/app/policies/controllers/signatures_controller_policy.rb
index 55039c023..2e622d751 100644
--- a/app/policies/controllers/signatures_controller_policy.rb
+++ b/app/policies/controllers/signatures_controller_policy.rb
@@ -1,6 +1,6 @@
 # Copyright (C) 2012-2021 Zammad Foundation, http://zammad-foundation.org/
 
 class Controllers::SignaturesControllerPolicy < Controllers::ApplicationControllerPolicy
-  permit! %i[index show], to: ['ticket.agent', 'admin.channel_email']
-  permit! %i[create update destroy], to: 'admin.channel_email'
+  permit! %i[index show], to: ['ticket.agent', 'admin.channel_email', 'admin.channel_google', 'admin.channel_microsoft365']
+  permit! %i[create update destroy], to: ['admin.channel_email', 'admin.channel_google', 'admin.channel_microsoft365']
 end
diff --git a/db/migrate/20210914153600_issue_3194_update_permissions.rb b/db/migrate/20210914153600_issue_3194_update_permissions.rb
new file mode 100644
index 000000000..3878d7132
--- /dev/null
+++ b/db/migrate/20210914153600_issue_3194_update_permissions.rb
@@ -0,0 +1,28 @@
+# Copyright (C) 2012-2021 Zammad Foundation, http://zammad-foundation.org/
+
+class Issue3194UpdatePermissions < ActiveRecord::Migration[6.0]
+  def change
+    # return if it's a new setup
+    return if !Setting.exists?(name: 'system_init_done')
+
+    settings = %w[
+      ticket_subject_size
+      ticket_subject_re
+      ticket_subject_fwd
+      ticket_define_email_from
+      ticket_define_email_from_separator
+      postmaster_max_size
+      postmaster_follow_up_search_in
+      postmaster_sender_based_on_reply_to
+      postmaster_sender_is_agent_search_for_customer
+      postmaster_send_reject_if_mail_too_large
+      notification_sender
+      send_no_auto_response_reg_exp
+    ]
+
+    Setting.where(name: settings).each do |setting|
+      setting.preferences[:permission] += ['admin.channel_google', 'admin.channel_microsoft365']
+      setting.save
+    end
+  end
+end
diff --git a/db/seeds/settings.rb b/db/seeds/settings.rb
index 772cb2730..ae2ff84fe 100644
--- a/db/seeds/settings.rb
+++ b/db/seeds/settings.rb
@@ -2530,7 +2530,7 @@ Setting.create_if_not_exists(
   },
   state:       '110',
   preferences: {
-    permission: ['admin.channel_email'],
+    permission: ['admin.channel_email', 'admin.channel_google', 'admin.channel_microsoft365'],
   },
   frontend:    false
 )
@@ -2551,7 +2551,7 @@ Setting.create_if_not_exists(
   },
   state:       'RE',
   preferences: {
-    permission: ['admin.channel_email'],
+    permission: ['admin.channel_email', 'admin.channel_google', 'admin.channel_microsoft365'],
   },
   frontend:    false
 )
@@ -2573,7 +2573,7 @@ Setting.create_if_not_exists(
   },
   state:       'FWD',
   preferences: {
-    permission: ['admin.channel_email'],
+    permission: ['admin.channel_email', 'admin.channel_google', 'admin.channel_microsoft365'],
   },
   frontend:    false
 )
@@ -2600,7 +2600,7 @@ Setting.create_if_not_exists(
   },
   state:       'AgentNameSystemAddressName',
   preferences: {
-    permission: ['admin.channel_email'],
+    permission: ['admin.channel_email', 'admin.channel_google', 'admin.channel_microsoft365'],
   },
   frontend:    false
 )
@@ -2622,7 +2622,7 @@ Setting.create_if_not_exists(
   },
   state:       'via',
   preferences: {
-    permission: ['admin.channel_email'],
+    permission: ['admin.channel_email', 'admin.channel_google', 'admin.channel_microsoft365'],
   },
   frontend:    false
 )
@@ -2672,7 +2672,7 @@ Setting.create_if_not_exists(
   state:       10,
   preferences: {
     online_service_disable: true,
-    permission:             ['admin.channel_email'],
+    permission:             ['admin.channel_email', 'admin.channel_google', 'admin.channel_microsoft365'],
   },
   frontend:    false
 )
@@ -2699,7 +2699,7 @@ Setting.create_if_not_exists(
   },
   state:       [],
   preferences: {
-    permission: ['admin.channel_email'],
+    permission: ['admin.channel_email', 'admin.channel_google', 'admin.channel_microsoft365'],
   },
   frontend:    false
 )
@@ -2726,7 +2726,7 @@ Setting.create_if_not_exists(
   },
   state:       [],
   preferences: {
-    permission: ['admin.channel_email'],
+    permission: ['admin.channel_email', 'admin.channel_google', 'admin.channel_microsoft365'],
   },
   frontend:    false
 )
@@ -2752,7 +2752,7 @@ Setting.create_if_not_exists(
   },
   state:       true,
   preferences: {
-    permission: ['admin.channel_email'],
+    permission: ['admin.channel_email', 'admin.channel_google', 'admin.channel_microsoft365'],
   },
   frontend:    false
 )
@@ -2779,7 +2779,7 @@ Setting.create_if_not_exists(
   state:       true,
   preferences: {
     online_service_disable: true,
-    permission:             ['admin.channel_email'],
+    permission:             ['admin.channel_email', 'admin.channel_google', 'admin.channel_microsoft365'],
   },
   frontend:    false
 )
@@ -2802,7 +2802,7 @@ Setting.create_if_not_exists(
   state:       '#{config.product_name} <noreply@#{config.fqdn}>', # rubocop:disable Lint/InterpolationCheck
   preferences: {
     online_service_disable: true,
-    permission:             ['admin.channel_email'],
+    permission:             ['admin.channel_email', 'admin.channel_google', 'admin.channel_microsoft365'],
   },
   frontend:    false
 )
@@ -2825,7 +2825,7 @@ Setting.create_if_not_exists(
   state:       '(mailer-daemon|postmaster|abuse|root|noreply|noreply.+?|no-reply|no-reply.+?)@.+?',
   preferences: {
     online_service_disable: true,
-    permission:             ['admin.channel_email'],
+    permission:             ['admin.channel_email', 'admin.channel_google', 'admin.channel_microsoft365'],
   },
   frontend:    false
 )
diff --git a/spec/db/migrate/issue_3194_update_permissions_spec.rb b/spec/db/migrate/issue_3194_update_permissions_spec.rb
new file mode 100644
index 000000000..066873744
--- /dev/null
+++ b/spec/db/migrate/issue_3194_update_permissions_spec.rb
@@ -0,0 +1,9 @@
+# Copyright (C) 2012-2021 Zammad Foundation, http://zammad-foundation.org/
+
+require 'rails_helper'
+
+RSpec.describe Issue3194UpdatePermissions, type: :db_migration do
+  it 'does update settings with new permissions' do
+    expect { migrate }.to change { Setting.find_by(name: 'ticket_subject_size').preferences[:permission] }.to include('admin.channel_google', 'admin.channel_microsoft365')
+  end
+end