diff --git a/projects/ucap-webmessenger-app/src/app/services/notification.service.ts b/projects/ucap-webmessenger-app/src/app/services/notification.service.ts
index 68db247f..5e14844c 100644
--- a/projects/ucap-webmessenger-app/src/app/services/notification.service.ts
+++ b/projects/ucap-webmessenger-app/src/app/services/notification.service.ts
@@ -1,6 +1,13 @@
 import { Injectable, Inject } from '@angular/core';
 
-import { tap, withLatestFrom } from 'rxjs/operators';
+import {
+  tap,
+  withLatestFrom,
+  take,
+  map,
+  catchError,
+  finalize
+} from 'rxjs/operators';
 
 import { Store, select } from '@ngrx/store';
 
@@ -116,7 +123,12 @@ import { environment } from '../../environments/environment';
 import { NotificationMethod, LocaleCode } from '@ucap-webmessenger/core';
 import { Dictionary } from '@ngrx/entity';
 import { MessageType } from '@ucap-webmessenger/api-message';
-import { LogoutInfo, KEY_LOGOUT_INFO, KEY_VER_INFO } from '@app/types';
+import {
+  LogoutInfo,
+  KEY_LOGOUT_INFO,
+  KEY_VER_INFO,
+  KEY_LOGIN_RES_INFO
+} from '@app/types';
 import { TranslateService } from '@ngx-translate/core';
 import { deleteMessageSuccess } from '@app/store/messenger/message';
 import { ServerErrorCode } from '@ucap-webmessenger/protocol';
@@ -138,6 +150,8 @@ import { UserInfo, RoomUserData } from '@ucap-webmessenger/protocol-sync';
 import { VersionInfo2Response } from '@ucap-webmessenger/api-public';
 import { QueryProtocolService } from '@ucap-webmessenger/protocol-query';
 import { UserInfoListState } from '@app/store/messenger/room';
+import { DaesangProtocolService } from '@ucap-webmessenger/daesang';
+import { of } from 'rxjs';
 
 @Injectable()
 export class AppNotificationService {
@@ -149,6 +163,7 @@ export class AppNotificationService {
     private groupProtocolService: GroupProtocolService,
     private buddyProtocolService: BuddyProtocolService,
     private queryProtocolService: QueryProtocolService,
+    private daesangProtocolService: DaesangProtocolService,
     private statusProtocolService: StatusProtocolService,
     private translateService: TranslateService,
     private ucapTranslateService: UcapTranslateService,
@@ -233,25 +248,10 @@ export class AppNotificationService {
               (state: any) =>
                 state.messenger.sync.buddy2.entities as Dictionary<UserInfo>
             )
-          ),
-          this.store.pipe(
-            select(
-              (state: any) =>
-                state.messenger.sync.roomUserShort.entities as Dictionary<
-                  RoomUserData
-                >
-            )
           )
         ),
         tap(
-          ([
-            notiOrRes,
-            curRoomInfo,
-            curRoomUserInfo,
-            roomList,
-            buddyList,
-            roomUserShorts
-          ]) => {
+          ([notiOrRes, curRoomInfo, curRoomUserInfo, roomList, buddyList]) => {
             switch (notiOrRes.SSVC_TYPE) {
               case SSVC_TYPE_EVENT_SEND_RES:
               case SSVC_TYPE_EVENT_SEND_NOTI:
@@ -356,32 +356,70 @@ export class AppNotificationService {
                               senderInfo = curRoomUserInfo[noti.SENDER_SEQ];
                             }
 
-                            // STEP 3 >> In All Room Users.
+                            // STEP 3 >> user protocol
                             if (!senderInfo) {
-                              for (const key in roomUserShorts) {
-                                if (key === undefined) {
-                                  continue;
-                                }
+                              const loginRes = this.sessionStorageService.get<
+                                LoginResponse
+                              >(KEY_LOGIN_RES_INFO);
 
-                                if (roomUserShorts.hasOwnProperty(key)) {
-                                  const element = roomUserShorts[key];
-                                  const filteredUserInfos = element.userInfos.filter(
-                                    info => info.seq === noti.SENDER_SEQ
-                                  );
+                              this.daesangProtocolService
+                                .dataUserDaesang({
+                                  divCd: 'OPENNOTI',
+                                  seq: noti.SENDER_SEQ,
+                                  senderCompanyCode:
+                                    loginRes.userInfo.companyCode,
+                                  senderEmployeeType:
+                                    loginRes.userInfo.employeeType
+                                })
+                                .pipe(
+                                  take(1),
+                                  map(res => {
+                                    if (!!res && !!res.userInfo) {
+                                      senderInfo = res.userInfo;
+                                      let name = senderInfo.name;
+                                      let grade = senderInfo.grade;
 
-                                  if (
-                                    !!filteredUserInfos &&
-                                    filteredUserInfos.length > 0
-                                  ) {
-                                    senderInfo = filteredUserInfos[0];
-                                    break;
-                                  }
-                                }
-                              }
-                            }
+                                      switch (
+                                        this.ucapTranslateService.currentLang.toUpperCase()
+                                      ) {
+                                        case LocaleCode.English:
+                                          name = senderInfo.nameEn;
+                                          grade = senderInfo.gradeEn;
+                                          break;
+                                        case LocaleCode.Chinese:
+                                          name = senderInfo.nameCn;
+                                          grade = senderInfo.gradeCn;
+                                          break;
+                                      }
 
-                            // Sender Info setting.
-                            if (!!senderInfo) {
+                                      notiReq.title = this.translateService.instant(
+                                        'notification.titleChatEventArrivedByUser',
+                                        {
+                                          userInfo: !!grade
+                                            ? `${name} ${grade}`
+                                            : name
+                                        }
+                                      );
+
+                                      // Image set.
+                                      if (!!senderInfo.profileImageFile) {
+                                        const sessionVerinfo = this.sessionStorageService.get<
+                                          VersionInfo2Response
+                                        >(KEY_VER_INFO);
+                                        notiReq.image = `${sessionVerinfo.profileRoot}${senderInfo.profileImageFile}`;
+                                      }
+                                    }
+                                  }),
+                                  catchError(error => {
+                                    return of();
+                                  }),
+                                  finalize(() => {
+                                    this.nativeService.notify(notiReq);
+                                  })
+                                )
+                                .subscribe();
+                            } else {
+                              // Sender Info setting.
                               // name set
                               let name = senderInfo.name;
                               let grade = senderInfo.grade;
@@ -413,10 +451,10 @@ export class AppNotificationService {
                                 >(KEY_VER_INFO);
                                 notiReq.image = `${sessionVerinfo.profileRoot}${senderInfo.profileImageFile}`;
                               }
-                            }
 
-                            // express noti popup
-                            this.nativeService.notify(notiReq);
+                              // express noti popup
+                              this.nativeService.notify(notiReq);
+                            }
                           }
                         }
                       }