diff --git a/config/gitlab.yml.example b/config/gitlab.yml.example
index 93510356208..857643c006e 100644
--- a/config/gitlab.yml.example
+++ b/config/gitlab.yml.example
@@ -140,6 +140,12 @@ production: &base
     method: 'ssl' # "tls" or "ssl" or "plain"
     bind_dn: '_the_full_dn_of_the_user_you_will_bind_with'
     password: '_the_password_of_the_bind_user'
+
+    # This setting specifies if LDAP server is Active Directory LDAP server.
+    # For non AD servers it skips the AD specific queries.
+    # If your LDAP server is not AD, set this to false.
+    active_directory: true
+
     # If allow_username_or_email_login is enabled, GitLab will ignore everything
     # after the first '@' in the LDAP username submitted by the user on login.
     #
diff --git a/config/initializers/1_settings.rb b/config/initializers/1_settings.rb
index caf4ef25cdd..0d11ae6f33f 100644
--- a/config/initializers/1_settings.rb
+++ b/config/initializers/1_settings.rb
@@ -57,6 +57,7 @@ end
 Settings['ldap'] ||= Settingslogic.new({})
 Settings.ldap['enabled'] = false if Settings.ldap['enabled'].nil?
 Settings.ldap['allow_username_or_email_login'] = false if Settings.ldap['allow_username_or_email_login'].nil?
+Settings.ldap['active_directory'] = true if Settings.ldap['active_directory'].nil?
 
 
 Settings['omniauth'] ||= Settingslogic.new({})
diff --git a/lib/gitlab/ldap/access.rb b/lib/gitlab/ldap/access.rb
index c054b6f5865..d2235d2e3bc 100644
--- a/lib/gitlab/ldap/access.rb
+++ b/lib/gitlab/ldap/access.rb
@@ -28,7 +28,9 @@ module Gitlab
 
       def allowed?(user)
         if Gitlab::LDAP::Person.find_by_dn(user.extern_uid, adapter)
-          !Gitlab::LDAP::Person.disabled_via_active_directory?(user.extern_uid, adapter)
+          if Gitlab.config.ldap.active_directory
+            !Gitlab::LDAP::Person.disabled_via_active_directory?(user.extern_uid, adapter)
+          end
         else
           false
         end
diff --git a/spec/lib/gitlab/ldap/access_spec.rb b/spec/lib/gitlab/ldap/access_spec.rb
index 2307a03f656..d50f605e050 100644
--- a/spec/lib/gitlab/ldap/access_spec.rb
+++ b/spec/lib/gitlab/ldap/access_spec.rb
@@ -27,6 +27,21 @@ describe Gitlab::LDAP::Access do
 
         it { should be_true }
       end
+
+      context 'and has no disabled flag in active diretory' do
+        before {
+          Gitlab::LDAP::Person.stub(disabled_via_active_directory?: false)
+          Gitlab.config.ldap['enabled'] = true
+          Gitlab.config.ldap['active_directory'] = false
+        }
+
+        after {
+          Gitlab.config.ldap['enabled'] = false
+          Gitlab.config.ldap['active_directory'] = true
+        }
+
+        it { should be_false }
+      end
     end
   end
 end