diff --git a/app/assets/stylesheets/default_data_block.scss b/app/assets/stylesheets/default_data_block.scss
index adc1ad053..9de8963fe 100644
--- a/app/assets/stylesheets/default_data_block.scss
+++ b/app/assets/stylesheets/default_data_block.scss
@@ -2,8 +2,6 @@
   font-family: Arial;
 
   .show-block {
-    width: 840px;
-    min-width: 840px;
     margin-left: auto;
     margin-right: auto;
     box-shadow: 0 0 1px 0 rgba(0, 0, 0, 0.5);
diff --git a/app/assets/stylesheets/navbar.scss b/app/assets/stylesheets/navbar.scss
index ff11f412f..bad10bfdb 100644
--- a/app/assets/stylesheets/navbar.scss
+++ b/app/assets/stylesheets/navbar.scss
@@ -34,7 +34,7 @@
     }
   }
   #navbar-body {
-    height: 60px;
+    min-height: 60px;
     background-color: #FFFFFF;
     box-shadow: 0 1px 2px 0 rgba(50,50,50,0.5);
     padding-left: 50px;
@@ -43,7 +43,7 @@
       font-size: 18px;
       font-weight: bold;
       line-height: 58px;
-      height: 58px;
+      min-height: 58px;
       color: #000000;
       overflow: hidden;
       text-overflow: ellipsis;
@@ -56,7 +56,7 @@
       color: #666666;
       padding: 8px;
       border-right: 1px solid #C8C6C8;
-      height: 60px;
+      min-height: 60px;
       .dropdown-toggle {
         cursor: pointer;
       }
diff --git a/app/controllers/backoffice/dossiers_controller.rb b/app/controllers/backoffice/dossiers_controller.rb
index 88b4fd83e..267b5cfee 100644
--- a/app/controllers/backoffice/dossiers_controller.rb
+++ b/app/controllers/backoffice/dossiers_controller.rb
@@ -159,6 +159,15 @@ class Backoffice::DossiersController < Backoffice::DossiersListController
     redirect_to backoffice_dossiers_path
   end
 
+  def reopen
+    create_dossier_facade params[:dossier_id]
+
+    @facade.dossier.initiated!
+    flash.notice = 'Dossier réouvert.'
+
+    redirect_to backoffice_dossiers_path
+  end
+
   private
 
   def create_dossier_facade dossier_id
diff --git a/app/decorators/mail_template_decorator.rb b/app/decorators/mail_template_decorator.rb
index d75b576c7..b9c153553 100644
--- a/app/decorators/mail_template_decorator.rb
+++ b/app/decorators/mail_template_decorator.rb
@@ -5,6 +5,7 @@ class MailTemplateDecorator < Draper::Decorator
     case object.type
     when "MailReceived"
       "E-mail d'accusé de réception"
+    else
       object.type
     end
   end
diff --git a/app/views/backoffice/dossiers/show.html.haml b/app/views/backoffice/dossiers/show.html.haml
index 1e8fd6961..be9e5d17d 100644
--- a/app/views/backoffice/dossiers/show.html.haml
+++ b/app/views/backoffice/dossiers/show.html.haml
@@ -1,2 +1,2 @@
-%div.col-lg-12.col-md-12.col-sm-12.col-xs-12#backoffice_dossier_show
+#backoffice_dossier_show.col-xs-12
   = render partial: "dossiers/dossier_show"
diff --git a/app/views/layouts/_main_container.html.haml b/app/views/layouts/_main_container.html.haml
index 362a66024..9e04a4a32 100644
--- a/app/views/layouts/_main_container.html.haml
+++ b/app/views/layouts/_main_container.html.haml
@@ -1,4 +1,4 @@
-%div#main-container{class: "col-lg-#{main_container_size} col-md-#{main_container_size}"}
+%div#main-container{class: "col-xs-#{main_container_size}"}
   %div.row
     = render partial: 'layouts/flash_messages'
   %div.row
diff --git a/app/views/layouts/left_panels/_left_panel_backoffice_dossierscontroller_show.html.haml b/app/views/layouts/left_panels/_left_panel_backoffice_dossierscontroller_show.html.haml
index 13a482ccc..43dbfac81 100644
--- a/app/views/layouts/left_panels/_left_panel_backoffice_dossierscontroller_show.html.haml
+++ b/app/views/layouts/left_panels/_left_panel_backoffice_dossierscontroller_show.html.haml
@@ -17,6 +17,7 @@
       = form_tag(url_for({controller: 'backoffice/dossiers', action: :refuse, dossier_id: @facade.dossier.id}), class: 'form-inline action_button', method: 'POST', style: 'display:inline', 'data-toggle' => :tooltip, title: 'Refuser') do
         %button.action.refuse-dossier
           %i.fa.fa-times
+      = link_to 'Reouvrir', backoffice_dossier_reopen_path(@facade.dossier), method: :post, class: 'btn btn-default btn-block'
 
     - unless @facade.dossier.archived?
       = link_to 'Archiver', backoffice_dossier_archive_path(@facade.dossier), method: :post, class: 'btn btn-default btn-block'
diff --git a/app/views/layouts/navbars/_navbar_admin_procedurescontroller_index.html.haml b/app/views/layouts/navbars/_navbar_admin_procedurescontroller_index.html.haml
index b4d06fa30..8adfbc93d 100644
--- a/app/views/layouts/navbars/_navbar_admin_procedurescontroller_index.html.haml
+++ b/app/views/layouts/navbars/_navbar_admin_procedurescontroller_index.html.haml
@@ -1,6 +1,6 @@
-%div.col-lg-8.col-md-8.col-sm-8.col-xs-8.main-info
+.col-xs-7.main-info
 
-%div.col-lg-3.col-md-3.col-sm-3.col-xs-3.options
+.col-xs-3.options
   %div{ style: "decorate:none; display: flex;box-shadow:none; float:right; display: flex; margin-top: 5px" }
     %div{ style: "vertical-align: middle; margin-right: 10px; margin-top: auto; margin-bottom: auto;" }
       = current_administrateur.email
diff --git a/app/views/layouts/navbars/_navbar_backoffice_dossiers_procedurecontroller_index.html.haml b/app/views/layouts/navbars/_navbar_backoffice_dossiers_procedurecontroller_index.html.haml
index 453341a12..79fba1681 100644
--- a/app/views/layouts/navbars/_navbar_backoffice_dossiers_procedurecontroller_index.html.haml
+++ b/app/views/layouts/navbars/_navbar_backoffice_dossiers_procedurecontroller_index.html.haml
@@ -1,4 +1,4 @@
-%div.col-lg-8.col-md-8.col-sm-8.col-xs-8.main-info
+.col-xs-7.main-info
   = @facade_data_view.procedure_id.nil? ? "Tous les dossiers" :  @facade_data_view.procedure.libelle
 %div.col-lg-3.col-md-3.col-sm-3.col-xs-3.options
   %div.row
diff --git a/app/views/layouts/navbars/_navbar_backoffice_dossierscontroller_show.html.haml b/app/views/layouts/navbars/_navbar_backoffice_dossierscontroller_show.html.haml
index 9e0a297d8..bcf5694b2 100644
--- a/app/views/layouts/navbars/_navbar_backoffice_dossierscontroller_show.html.haml
+++ b/app/views/layouts/navbars/_navbar_backoffice_dossierscontroller_show.html.haml
@@ -1,9 +1,9 @@
-%div.col-lg-8.col-md-8.col-sm-8.col-xs-8.main-info
+.col-xs-7.main-info
   %span{ 'data-toggle' => :tooltip, "data-placement" => :bottom, title: @facade.dossier.procedure.libelle }
     = @facade.dossier.procedure.libelle
-%div.col-lg-3.col-md-3.col-sm-3.col-xs-3.options
-  %div.row
-    %div.col-lg-12.col-md-12.col-sm-12.col-xs-12
+.col-xs-3.options
+  .row
+    .col-xs-12
       - if current_gestionnaire.follow?(@facade.dossier.id)
         = link_to backoffice_dossier_follow_path(dossier_id: @facade.dossier.id), "data-method" => :put, class: "button-navbar-action",id: "suivre_dossier_#{@facade.dossier.id}" do
           %i.fa.fa-user-times
@@ -12,14 +12,14 @@
         = link_to backoffice_dossier_follow_path(dossier_id: @facade.dossier.id), 'data-method' => :put, class: 'button-navbar-action', id: "suivre_dossier_#{@facade.dossier.id}" do
           %i.fa.fa-user-plus
           Suivre le dossier
-  %div.row
-    %div.col-lg-12.col-md-12.col-sm-12.col-xs-12
-      %div#invitations.dropdown-toggle{ 'data-toggle' => 'dropdown', 'aria-haspopup' => true, 'aria-expanded' => false }
+  .row
+    .col-xs-12
+      #invitations.dropdown-toggle{ 'data-toggle' => 'dropdown', 'aria-haspopup' => true, 'aria-expanded' => false }
         %i.fa.fa-user
         = t('utils.involved')
         .badge.progress-bar-info
           = @facade.dossier.invites.count
-      %div.dropdown-menu.dropdown-menu-right.dropdown-pannel
+      .dropdown-menu.dropdown-menu-right.dropdown-pannel
         %h4= t('dynamics.dossiers.followers.title')
         %ul
           - unless @facade.followers.empty?
diff --git a/app/views/layouts/navbars/_navbar_log_options.html.haml b/app/views/layouts/navbars/_navbar_log_options.html.haml
index 99709e842..a5d8ca7e1 100644
--- a/app/views/layouts/navbars/_navbar_log_options.html.haml
+++ b/app/views/layouts/navbars/_navbar_log_options.html.haml
@@ -1,17 +1,15 @@
--#%span.fa.fa-sign-out
-
 -if user_signed_in?
-  .col-lg-1.col-md-1.col-sm-1.col-xs-1#sign_out.no-padding
+  #sign_out.col-xs-2.no-padding
     = render partial: 'users/login_banner'
     = render partial: 'layouts/credentials'
 -elsif gestionnaire_signed_in?
-  .col-lg-1.col-md-1.col-sm-1.col-xs-1#sign_out.no-padding
+  #sign_out.col-xs-2.no-padding
     = render partial: 'gestionnaires/login_banner'
     = render partial: 'layouts/credentials'
 -elsif administrateur_signed_in?
-  .col-lg-1.col-md-1.col-sm-1.col-xs-1#sign_out.no-padding
+  #sign_out.col-xs-2.no-padding
     = render partial: 'administrateurs/login_banner'
     = render partial: 'layouts/credentials'
 -else
-  .col-lg-1.col-md-1.col-sm-1.col-xs-1#sign_in
+  #sign_in.col-xs-2
     = link_to "Connexion", new_user_session_path, :class => 'btn btn-lg btn-primary'
\ No newline at end of file
diff --git a/app/views/layouts/navbars/_navbar_users_recapitulatifcontroller_show.html.haml b/app/views/layouts/navbars/_navbar_users_recapitulatifcontroller_show.html.haml
index b82f836ad..7a5f4299b 100644
--- a/app/views/layouts/navbars/_navbar_users_recapitulatifcontroller_show.html.haml
+++ b/app/views/layouts/navbars/_navbar_users_recapitulatifcontroller_show.html.haml
@@ -1,4 +1,4 @@
-%div.col-lg-8.col-md-8.col-sm-8.col-xs-8.main-info
+.col-xs-7.main-info
   %span{ 'data-toggle' => :tooltip, "data-placement" => :bottom, title: @facade.dossier.procedure.libelle }
     = @facade.dossier.procedure.libelle.truncate(60)
 %div.col-lg-3.col-md-3.col-sm-3.col-xs-3.options
diff --git a/config/routes.rb b/config/routes.rb
index dfffb56eb..1c3f99b72 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -163,6 +163,7 @@ Rails.application.routes.draw do
       post 'without_continuation' => 'dossiers#without_continuation'
       post 'close' => 'dossiers#close'
       post 'archive' => 'dossiers#archive'
+      post 'reopen' => 'dossiers#reopen'
 
       put 'follow' => 'dossiers#follow'
       resources :commentaires, only: [:index]
diff --git a/spec/controllers/backoffice/dossiers_controller_spec.rb b/spec/controllers/backoffice/dossiers_controller_spec.rb
index a73cfddff..3d0043ea6 100644
--- a/spec/controllers/backoffice/dossiers_controller_spec.rb
+++ b/spec/controllers/backoffice/dossiers_controller_spec.rb
@@ -357,6 +357,23 @@ describe Backoffice::DossiersController, type: :controller do
     end
   end
 
+  describe 'POST #reopen' do
+    before do
+      dossier.received!
+      sign_in gestionnaire
+    end
+
+    subject { post :reopen, params: {dossier_id: dossier_id} }
+
+    it 'change state to initiated' do
+      subject
+
+      dossier.reload
+      expect(dossier.state).to eq('initiated')
+    end
+
+    it { is_expected.to redirect_to backoffice_dossiers_path }
+  end
 
   describe 'POST #archive' do
     before do