diff --git a/assets/stylesheets/login.css.redminebuttonstyle b/assets/stylesheets/login.css.redminebuttonstyle
new file mode 100644
index 0000000..dc5becf
--- /dev/null
+++ b/assets/stylesheets/login.css.redminebuttonstyle
@@ -0,0 +1,20 @@
+#saml-login {
+    margin: 1em auto 2em auto;
+    padding: 20px;
+    width: 340px;
+    border: 1px solid #FDBF3B;
+    background-color: #FFEBC1;
+    border-radius: 4px;
+    box-sizing: border-box;
+}
+
+#saml-login form button[type='submit'] {
+    display: block;
+    width: 100%;
+}
+
+#saml-login form button[type='submit']:hover {
+  background-color: #c7c6c5  !important;
+}
+
+#login-form table { margin-top: 2em; }
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 14b34f3..bb7751d 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -1,6 +1,6 @@
 en:
   error_saml_authenticity_error: SAML authentication error
-  error_saml_invalid_ticket: Invalid SAML ticket
+  error_saml_invalid_ticket: Invalid SAML ticket (check IDP cert /IDP cert fingerprint)
   label_onthefly_creation: Create users automatically?
   label_replace_redmine_login: Replace Redmine login page
   label_saml_enabled: Enable SAML authentication
diff --git a/lib/redmine_saml/base.rb b/lib/redmine_saml/base.rb
index 3007147..dea5760 100644
--- a/lib/redmine_saml/base.rb
+++ b/lib/redmine_saml/base.rb
@@ -61,7 +61,7 @@ def validated_configuration?
       end
 
       def required_attribute_mapping
-        %i[login firstname lastname mail]
+        %i[login firstname lastname mail admin]
       end
 
       def validate_configuration!
diff --git a/lib/redmine_saml/patches/user_patch.rb b/lib/redmine_saml/patches/user_patch.rb
index e8ce90f..cb5b7a4 100644
--- a/lib/redmine_saml/patches/user_patch.rb
+++ b/lib/redmine_saml/patches/user_patch.rb
@@ -25,6 +25,12 @@ def find_or_create_from_omniauth(omniauth)
             user.login = user_attributes[:login].presence || user_attributes[:mail]
             user.language = Setting.default_language
             user.activate
+            if user_attributes[:admin].present?
+              user.admin = user_attributes[:admin]
+            else
+              user.admin = 'false'
+            end
+
             user.save!
             user.reload
           end
@@ -35,6 +41,11 @@ def find_or_create_from_omniauth(omniauth)
             user.admin = user_attributes[:admin] if user_attributes[:admin].present?
           end
 
+          # Debug : check attributes retrueved by the RedmineSaml.user_attributes_from_saml method
+          # File.write('/tmp/attributes.txt', user_attributes)
+
+
+          
           RedmineSaml.on_login_callback&.call omniauth, user
 
           user