diff --git a/src/app/modals/create-process/create-process.page.html b/src/app/modals/create-process/create-process.page.html
index fa36fe6fb..d67a970cb 100644
--- a/src/app/modals/create-process/create-process.page.html
+++ b/src/app/modals/create-process/create-process.page.html
@@ -91,7 +91,7 @@
             <div class="ion-icon-class">
               <ion-icon slot="start" src="assets/images/icons-person.svg"></ion-icon>
             </div>
-            <div class="ion-input-class-no-height">
+            <div class="ion-input-class-no-height" [class.input-error]="Form?.get('participantes')?.invalid  && validateFrom ">
               <div class="list-people">
                 <ion-item lines="none">
                   <ion-list>
diff --git a/src/app/modals/create-process/create-process.page.ts b/src/app/modals/create-process/create-process.page.ts
index 7bc81d03f..9995d0bf5 100644
--- a/src/app/modals/create-process/create-process.page.ts
+++ b/src/app/modals/create-process/create-process.page.ts
@@ -185,7 +185,7 @@ export class CreateProcessPage implements OnInit {
         Validators.required,
       ]),
       participantes: new FormControl(this.taskParticipants, [
-        // Validators.required
+        Validators.required
       ]),
       selectedTypes: new FormControl(this.selectedTypes, [
         Validators.required,
diff --git a/src/app/pages/gabinete-digital/expediente/book-meeting-modal/book-meeting-modal.page.html b/src/app/pages/gabinete-digital/expediente/book-meeting-modal/book-meeting-modal.page.html
index 535832bdb..60799f41d 100644
--- a/src/app/pages/gabinete-digital/expediente/book-meeting-modal/book-meeting-modal.page.html
+++ b/src/app/pages/gabinete-digital/expediente/book-meeting-modal/book-meeting-modal.page.html
@@ -206,7 +206,7 @@
             <div class="ion-icon-class">
               <ion-icon slot="start" src="assets/images/icons-person.svg"></ion-icon>
             </div>
-            <div class="ion-input-class-no-height">
+            <div class="ion-input-class-no-height" [class.input-error]="Form?.get('participantes')?.invalid  && validateFrom ">
               <div class="list-people">
                 <ion-item lines="none">
                   <ion-list>
diff --git a/src/app/pages/gabinete-digital/expediente/book-meeting-modal/book-meeting-modal.page.ts b/src/app/pages/gabinete-digital/expediente/book-meeting-modal/book-meeting-modal.page.ts
index b8df83005..cfd5ebc8d 100644
--- a/src/app/pages/gabinete-digital/expediente/book-meeting-modal/book-meeting-modal.page.ts
+++ b/src/app/pages/gabinete-digital/expediente/book-meeting-modal/book-meeting-modal.page.ts
@@ -197,9 +197,9 @@ export class BookMeetingModalPage implements OnInit {
       Date: new FormControl(this.dateValid, [
         Validators.required
       ]),
-      // participantes: new FormControl(this.taskParticipantsCc.concat(this.taskParticipants), [
-      //   Validators.required
-      // ]),
+      participantes: new FormControl(this.taskParticipants, [
+        Validators.required
+      ]),
 
     })
   }
diff --git a/src/app/shared/agenda/edit-event-to-approve/edit-event-to-approve.page.ts b/src/app/shared/agenda/edit-event-to-approve/edit-event-to-approve.page.ts
index 21daefe73..79417118f 100644
--- a/src/app/shared/agenda/edit-event-to-approve/edit-event-to-approve.page.ts
+++ b/src/app/shared/agenda/edit-event-to-approve/edit-event-to-approve.page.ts
@@ -220,7 +220,7 @@ export class EditEventToApprovePage implements OnInit {
       //   Validators.required
       // ]),
       participantes: new FormControl(this.taskParticipants, [
-        // Validators.required
+        Validators.required
       ]),
 
     })
diff --git a/src/app/shared/agenda/edit-event/edit-event.page.ts b/src/app/shared/agenda/edit-event/edit-event.page.ts
index a357303c8..33f20a2f3 100644
--- a/src/app/shared/agenda/edit-event/edit-event.page.ts
+++ b/src/app/shared/agenda/edit-event/edit-event.page.ts
@@ -180,7 +180,7 @@ export class EditEventPage implements OnInit {
         Validators.required
       ]),
       participantes: new FormControl(this.taskParticipants, [
-        // Validators.required
+        Validators.required
       ]),
 
     })
diff --git a/src/app/shared/agenda/new-event/new-event.page.ts b/src/app/shared/agenda/new-event/new-event.page.ts
index 02229ce36..b25256782 100644
--- a/src/app/shared/agenda/new-event/new-event.page.ts
+++ b/src/app/shared/agenda/new-event/new-event.page.ts
@@ -250,7 +250,7 @@ export class NewEventPage implements OnInit {
         Validators.required
       ]),
       participantes: new FormControl(this.taskParticipants, [
-        // Validators.required
+        Validators.required
       ]),
 
     })