diff --git a/workflow/engine/classes/LdapAdvanced.php b/workflow/engine/classes/LdapAdvanced.php
index 7811ac3f8..3f7f95e79 100644
--- a/workflow/engine/classes/LdapAdvanced.php
+++ b/workflow/engine/classes/LdapAdvanced.php
@@ -504,7 +504,7 @@ class LdapAdvanced
      * @param Array $aAuthSource the authsource data
      * @return Object A object with the resulting ldap bind
      */
-    public function ldapConnection($aAuthSource)
+    public function ldapConnection($aAuthSource, &$resultLDAPStartTLS = false)
     {
         $pass = explode("_", $aAuthSource["AUTH_SOURCE_PASSWORD"]);
 
@@ -522,7 +522,7 @@ class LdapAdvanced
         ldap_set_option($ldapcnn, LDAP_OPT_REFERRALS, 0);
 
         if (isset($aAuthSource["AUTH_SOURCE_ENABLED_TLS"]) && $aAuthSource["AUTH_SOURCE_ENABLED_TLS"]) {
-            @ldap_start_tls($ldapcnn);
+            $resultLDAPStartTLS = @ldap_start_tls($ldapcnn);
             $ldapServer = "TLS " . $ldapServer;
             //$this->log($ldapcnn, "start tls");
         }
diff --git a/workflow/engine/content/translations/english/processmaker.en.po b/workflow/engine/content/translations/english/processmaker.en.po
index a5264d7ad..eb3207e04 100755
--- a/workflow/engine/content/translations/english/processmaker.en.po
+++ b/workflow/engine/content/translations/english/processmaker.en.po
@@ -26321,6 +26321,12 @@ msgstr "Start Case"
 msgid "Unassigned"
 msgstr "Unassigned"
 
+# TRANSLATION
+# LABEL/ID_TLS_CERTIFICATE_IS_NOT_INSTALLED_IN_THE_SERVER
+#: LABEL/ID_TLS_CERTIFICATE_IS_NOT_INSTALLED_IN_THE_SERVER
+msgid "TLS certificate is not installed in the server."
+msgstr "TLS certificate is not installed in the server."
+
 # TRANSLATION
 # LABEL/ID_TO
 #: LABEL/ID_TO
diff --git a/workflow/engine/data/mysql/insert.sql b/workflow/engine/data/mysql/insert.sql
index c82ead8d0..77080b656 100755
--- a/workflow/engine/data/mysql/insert.sql
+++ b/workflow/engine/data/mysql/insert.sql
@@ -61343,6 +61343,7 @@ INSERT INTO TRANSLATION (TRN_CATEGORY,TRN_ID,TRN_LANG,TRN_VALUE,TRN_UPDATE_DATE
 ( 'LABEL','ID_TITLE_REQUIRED','en','Title is required.','2014-10-22') ,
 ( 'LABEL','ID_TITLE_START_CASE','en','Start Case','2014-01-15') ,
 ( 'LABEL','ID_TITLE_UNASSIGNED','en','Unassigned','2014-01-15') ,
+( 'LABEL','ID_TLS_CERTIFICATE_IS_NOT_INSTALLED_IN_THE_SERVER','en','TLS certificate is not installed in the server.','2020-12-30') ,
 ( 'LABEL','ID_TO','en','To','2014-01-15') ,
 ( 'LABEL','ID_TODAY','en','Today','2014-01-15') ,
 ( 'LABEL','ID_TOOLS','en','Tools','2014-01-15') ,
diff --git a/workflow/engine/methods/authSources/ldapAdvancedProxy.php b/workflow/engine/methods/authSources/ldapAdvancedProxy.php
index a394180e1..1d3662941 100644
--- a/workflow/engine/methods/authSources/ldapAdvancedProxy.php
+++ b/workflow/engine/methods/authSources/ldapAdvancedProxy.php
@@ -392,10 +392,14 @@ switch ($function) {
             //Test connection
             $ldapAdvanced = new LdapAdvanced();
 
-            $ldapcnn = $ldapAdvanced->ldapConnection($arrayAuthenticationSourceData);
+            $resultLDAPStartTLS = true;
+            $ldapcnn = $ldapAdvanced->ldapConnection($arrayAuthenticationSourceData, $resultLDAPStartTLS);
 
             //Response
             $response["status"] = "OK";
+            if ($resultLDAPStartTLS === false) {
+                $response["message"] = G::LoadTranslation("ID_TLS_CERTIFICATE_IS_NOT_INSTALLED_IN_THE_SERVER");
+            }
         } catch (Exception $e) {
             //Response
             $response["status"] = "ERROR";
diff --git a/workflow/engine/methods/authenticationSources/src/components/formAuthenticationSources.vue b/workflow/engine/methods/authenticationSources/src/components/formAuthenticationSources.vue
index a030ae7d8..35cf2acb4 100644
--- a/workflow/engine/methods/authenticationSources/src/components/formAuthenticationSources.vue
+++ b/workflow/engine/methods/authenticationSources/src/components/formAuthenticationSources.vue
@@ -283,6 +283,15 @@
                                             if (response.data.status === "OK") {
                                                 this.testStatus = true;
                                                 this.buttonLabel = this.$root.translation("ID_SAVE");
+                                                if ("message" in response.data) {
+                                                    this.$bvModal.msgBoxOk(response.data.message, {
+                                                        title: " ", //is important because title disappear
+                                                        hideHeaderClose: false,
+                                                        okTitle: this.$root.translation('ID_OK'),
+                                                        okVariant: "success",
+                                                        okOnly: true
+                                                    });
+                                                }
                                                 this.$bvModal.msgBoxOk(this.$root.translation('ID_SUCCESSFUL_TEST_CONNECTION'), {
                                                     title: " ", //is important because title disappear
                                                     hideHeaderClose: false,