diff --git a/axonivy-express/src/ch/ivy/addon/portalkit/util/AdhocUtils.java b/axonivy-express/src/ch/ivy/addon/portalkit/util/AdhocUtils.java
index 3d8d705..2a65575 100644
--- a/axonivy-express/src/ch/ivy/addon/portalkit/util/AdhocUtils.java
+++ b/axonivy-express/src/ch/ivy/addon/portalkit/util/AdhocUtils.java
@@ -10,6 +10,7 @@
 import ch.ivy.gawfs.DynaFormController;
 import ch.ivy.gawfs.Formelement;
 import ch.ivyteam.ivy.environment.Ivy;
+import ch.ivyteam.ivy.security.exec.Sudo;
 import ch.ivyteam.ivy.workflow.ICase;
 import gawfs.ExecutePredefinedWorkflowData;
 import gawfs.TaskDef;
@@ -40,7 +41,7 @@ public static void storeHistory(long originalTaskId, String content) {
   }
   
   public static void attachToBusinessCase(final ICase icase, final Long businessCaseId) {
-    IvyExecutor.executeAsSystem(() -> {
+    Sudo.get(() -> {
         icase.attachToBusinessCase(businessCaseId);
         return null;
     });
diff --git a/axonivy-express/src/ch/ivy/addon/portalkit/util/ExecutingExpressProcessUtils.java b/axonivy-express/src/ch/ivy/addon/portalkit/util/ExecutingExpressProcessUtils.java
index c12c764..02169e4 100644
--- a/axonivy-express/src/ch/ivy/addon/portalkit/util/ExecutingExpressProcessUtils.java
+++ b/axonivy-express/src/ch/ivy/addon/portalkit/util/ExecutingExpressProcessUtils.java
@@ -9,6 +9,7 @@
 import ch.ivy.addon.portalkit.service.exception.PortalException;
 import ch.ivyteam.ivy.environment.Ivy;
 import ch.ivyteam.ivy.persistence.PersistencyException;
+import ch.ivyteam.ivy.security.exec.Sudo;
 import ch.ivyteam.ivy.workflow.ICase;
 import ch.ivyteam.ivy.workflow.ITask;
 import ch.ivyteam.ivy.workflow.query.CaseQuery;
@@ -21,7 +22,7 @@ private ExecutingExpressProcessUtils() {}
 
   @SuppressWarnings("unchecked")
   public static <T> List<T> getAttributesOfTasks(String groupId, String attribute) {
-    return IvyExecutor.executeAsSystem(() -> {
+    return Sudo.get(() -> {
       TaskQuery query =
           TaskQuery.create().where().caseId().isEqual(Ivy.wfCase().getId()).and().customField().textField(TASK_GROUP_ID_KEY)
               .isEqual(groupId).orderBy().endTimestamp();
@@ -40,7 +41,7 @@ public static <T> List<T> getAttributesOfTasks(String groupId, String attribute)
   
   @SuppressWarnings("unchecked")
   public static <T> List<T> getExpressTaskEndProcessData(Long caseId, String parentCategoryName) {
-    return IvyExecutor.executeAsSystem(() -> {
+    return Sudo.get(() -> {
       TaskQuery query = buildExpressTaskQuery(caseId, parentCategoryName);
       query.orderBy().endTimestamp();
       List<ITask> tasks = Ivy.wf().getTaskQueryExecutor().getResults(query);
@@ -66,7 +67,7 @@ private static TaskQuery buildExpressTaskQuery(Long caseId, String parentCategor
   }
 
   public static ICase getExpressCase(long caseId) {
-    return IvyExecutor.executeAsSystem(() -> {
+    return Sudo.get(() -> {
       CaseQuery query = CaseQuery.businessCases().where().caseId().isEqual(caseId)
           .and().customField().stringField(CustomFields.IS_EXPRESS_PROCESS).isEqual("true");
       List<ICase> result = Ivy.wf().getCaseQueryExecutor().getResults(query);
diff --git a/axonivy-express/src/ch/ivy/gawfs/mail/ExpressMailClient.java b/axonivy-express/src/ch/ivy/gawfs/mail/ExpressMailClient.java
index c461667..e7c912f 100644
--- a/axonivy-express/src/ch/ivy/gawfs/mail/ExpressMailClient.java
+++ b/axonivy-express/src/ch/ivy/gawfs/mail/ExpressMailClient.java
@@ -10,7 +10,6 @@
 
 import ch.ivy.addon.portalkit.bo.ExpressUserEmail;
 import ch.ivy.addon.portalkit.dto.ExpressAttachment;
-import ch.ivy.addon.portalkit.util.IvyExecutor;
 import ch.ivyteam.ivy.environment.Ivy;
 import ch.ivyteam.ivy.mail.Attachment;
 import ch.ivyteam.ivy.mail.MailClient;
@@ -19,11 +18,12 @@
 import ch.ivyteam.ivy.mail.MailMessage;
 import ch.ivyteam.ivy.mail.MailMessage.Builder;
 import ch.ivyteam.ivy.scripting.objects.File;
+import ch.ivyteam.ivy.security.exec.Sudo;
 
 public class ExpressMailClient {
 
   public static void send(ExpressUserEmail mail) {
-    IvyExecutor.executeAsSystem(() -> {
+    Sudo.get(() -> {
       MailMessage message = mapMailMessage(mail);
       MailClientConfig mailSetupConfig = getMailClientConfig();