diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.html b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.html
index bb3d6cfb..4a301e5e 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.html
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.html
@@ -77,7 +77,7 @@
                   {{ roomInfo.roomName }}
                 </ng-template>
                 <ng-template #roomNameNotExist>
-                  {{ _roomUserInfos | ucapTranslate: 'name':',' }}
+                  {{ getRoomNameByRoomUser(_roomUserInfos) }}
                 </ng-template>
               </ng-container>
             </ng-container>
@@ -319,9 +319,7 @@
   #messageContextMenuTrigger="matMenuTrigger"
   [matMenuTriggerFor]="messageContextMenu"
 ></div>
-<mat-menu
-  #messageContextMenu="matMenu"
->
+<mat-menu #messageContextMenu="matMenu">
   <ng-template matMenuContent let-message="message" let-clicktype="clicktype">
     <ng-container *ngIf="!isRecalledMessage(message.type)">
       <button
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.ts b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.ts
index 727bf19e..4f6080b5 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.ts
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.ts
@@ -6,7 +6,8 @@ import {
   AfterViewInit,
   Output,
   EventEmitter,
-  Inject
+  Inject,
+  ChangeDetectorRef
 } from '@angular/core';
 import {
   ucapAnimations,
@@ -60,7 +61,12 @@ import {
   RightDrawer,
   KEY_STICKER_HISTORY
 } from '@app/types';
-import { RoomInfo, UserInfo, RoomType } from '@ucap-webmessenger/protocol-room';
+import {
+  RoomInfo,
+  UserInfo,
+  RoomType,
+  UserInfoShort
+} from '@ucap-webmessenger/protocol-room';
 import { tap, take, map, catchError, finalize } from 'rxjs/operators';
 import { FormComponent as UCapUiChatFormComponent } from '@ucap-webmessenger/ui-chat';
 import { KEY_VER_INFO } from '@app/types';
@@ -109,6 +115,8 @@ import {
 } from '../dialogs/chat/mass-detail.component';
 import { NativeService, UCAP_NATIVE_SERVICE } from '@ucap-webmessenger/native';
 import { TranslateService } from '@ngx-translate/core';
+import { TranslatePipe } from 'projects/ucap-webmessenger-ui/src/lib/pipes/translate.pipe';
+import { TranslateService as uiTranslateService } from '@ucap-webmessenger/ui';
 
 @Component({
   selector: 'app-layout-messenger-messages',
@@ -209,7 +217,9 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
     private localStorageService: LocalStorageService,
     private commonApiService: CommonApiService,
     private clipboardService: ClipboardService,
+    private uiTranslateService: uiTranslateService,
     private translateService: TranslateService,
+    private changeDetectorRef: ChangeDetectorRef,
     private dialogService: DialogService,
     private snackBarService: SnackBarService,
     @Inject(UCAP_NATIVE_SERVICE) private nativeService: NativeService,
@@ -455,6 +465,18 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
       .sort((a, b) => (a.name < b.name ? -1 : a.name > b.name ? 1 : 0));
   }
 
+  getRoomNameByRoomUser(roomUserInfos: (UserInfo | UserInfoShort)[]) {
+    let roomName = new TranslatePipe(
+      this.uiTranslateService,
+      this.changeDetectorRef
+    ).transform(roomUserInfos, 'name', ',');
+
+    if (!roomName || roomName.trim().length === 0) {
+      roomName = this.translateService.instant('chat.noRoomUser');
+    }
+    return roomName;
+  }
+
   /** 대화전송 가능한 방인지 판단 */
   getEnableSend() {
     if (!this.roomInfo) {
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/right-drawer/album-box.component.html b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/right-drawer/album-box.component.html
index 45ddc55a..e7046c96 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/right-drawer/album-box.component.html
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/right-drawer/album-box.component.html
@@ -65,6 +65,7 @@
         />
         <video
           controls
+          controlsList="nodownload nofullscreen"
           *ngIf="selectedFile.info.type === FileType.Video"
           [src]="getImageUrl(selectedFile)"
           class="preview-video"
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/right-drawer/room-user-list.component.ts b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/right-drawer/room-user-list.component.ts
index f487f614..52acab5e 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/right-drawer/room-user-list.component.ts
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/right-drawer/room-user-list.component.ts
@@ -14,7 +14,7 @@ import * as AppStore from '@app/store';
 import * as SyncStore from '@app/store/messenger/sync';
 import * as RoomStore from '@app/store/messenger/room';
 
-import { UserInfo, RoomInfo } from '@ucap-webmessenger/protocol-room';
+import { UserInfo, RoomInfo, RoomType } from '@ucap-webmessenger/protocol-room';
 import { VersionInfo2Response } from '@ucap-webmessenger/api-public';
 import { SessionStorageService } from '@ucap-webmessenger/web-storage';
 import {
@@ -217,6 +217,9 @@ export class RoomUserListComponent implements OnInit, OnDestroy {
     event.preventDefault();
     event.stopPropagation();
 
+    if (this.roomInfo.roomType !== RoomType.Multi) {
+      return;
+    }
     if (buddy.seq === this.loginRes.userSeq) {
       return;
     }
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/message/message-detail.dialog.component.ts b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/message/message-detail.dialog.component.ts
index 389d4087..6ffb3c7d 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/message/message-detail.dialog.component.ts
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/message/message-detail.dialog.component.ts
@@ -424,7 +424,7 @@ export class MessageDetailDialogComponent implements OnInit {
                     // single :: success
                     this.snackBarService.open(
                       this.translateService.instant(
-                        'common.file.errors.savedToPath',
+                        'common.file.results.savedToPath',
                         { path: attachFile.downloadType }
                       ),
                       '',
@@ -437,7 +437,7 @@ export class MessageDetailDialogComponent implements OnInit {
                     // all
                     this.snackBarService.open(
                       this.translateService.instant(
-                        'common.file.errors.savedAll'
+                        'common.file.results.savedAll'
                       ),
                       '',
                       {
diff --git a/projects/ucap-webmessenger-app/src/app/pages/account/components/login.page.component.ts b/projects/ucap-webmessenger-app/src/app/pages/account/components/login.page.component.ts
index 47b49307..b21a8fdd 100644
--- a/projects/ucap-webmessenger-app/src/app/pages/account/components/login.page.component.ts
+++ b/projects/ucap-webmessenger-app/src/app/pages/account/components/login.page.component.ts
@@ -33,6 +33,7 @@ import { AppUserInfo, KEY_APP_USER_INFO } from '@app/types/app-user-info.type';
 import { LogoutInfo, KEY_LOGOUT_INFO } from '@app/types';
 import { AppAuthenticationService } from '@app/services/authentication.service';
 import { logoutInitialize } from '@app/store/account/authentication';
+import { TranslateService } from '@ngx-translate/core';
 
 @Component({
   selector: 'app-page-account-login',
@@ -85,6 +86,7 @@ export class LoginPageComponent implements OnInit, OnDestroy {
   constructor(
     private store: Store<any>,
     private router: Router,
+    private translateService: TranslateService,
     private dialogService: DialogService,
     private protocolService: ProtocolService,
     private localStorageService: LocalStorageService,
@@ -114,7 +116,7 @@ export class LoginPageComponent implements OnInit, OnDestroy {
         (this.rotateInfomationIndex + 1) % this.rotateInfomation.length;
     }, 8000);
 
-    this.defatulLoginBtnText = 'LOGIN';
+    this.defatulLoginBtnText = this.translateService.instant('accounts.login');
     this.defatulWaitingTime = 5 * 60; // sec
 
     this.store.dispatch(
@@ -140,8 +142,10 @@ export class LoginPageComponent implements OnInit, OnDestroy {
               >(AlertDialogComponent, {
                 width: '360px',
                 data: {
-                  title: '로그인',
-                  html: `아이디 또는 패스워드가<br/>일치하지 않습니다.`
+                  title: '',
+                  html: this.translateService.instant(
+                    'accounts.errors.loginFail'
+                  )
                 }
               });
             }
@@ -154,8 +158,10 @@ export class LoginPageComponent implements OnInit, OnDestroy {
               >(AlertDialogComponent, {
                 width: '360px',
                 data: {
-                  title: '로그인',
-                  html: `비밀번호 오류 횟수 초과입니다.<br/>비밀번호를 확인하신 후<br/>잠시 후 다시 시작해 주세요.`
+                  title: '',
+                  html: this.translateService.instant(
+                    'accounts.errors.loginFailOverTry'
+                  )
                 }
               });
 
@@ -182,11 +188,26 @@ export class LoginPageComponent implements OnInit, OnDestroy {
       KEY_LOGOUT_INFO
     );
 
-    if (
-      !!personLogout &&
-      !!personLogout.reasonCode &&
-      personLogout.reasonCode === ServerErrorCode.ERRCD_DUPLICATE
-    ) {
+    if (!!personLogout && !!personLogout.reasonCode) {
+      let msg = this.translateService.instant('accounts.results.doLogout');
+      switch (personLogout.reasonCode) {
+        case ServerErrorCode.ERRCD_DUPLICATE:
+          msg = this.translateService.instant(
+            'accounts.results.doLogoutDuplicate',
+            {
+              ip: personLogout.ip,
+              mac: personLogout.mac
+            }
+          );
+
+          break;
+        case ServerErrorCode.ERRCD_FORCE_INIT:
+          msg = this.translateService.instant(
+            'accounts.results.doLogoutByOthers'
+          );
+          break;
+      }
+
       const result = this.dialogService.open<
         AlertDialogComponent,
         AlertDialogData,
@@ -195,7 +216,7 @@ export class LoginPageComponent implements OnInit, OnDestroy {
         width: '360px',
         data: {
           title: '',
-          html: `다른 디바이스에서 로그인하였습니다.<br/> * Ip : ${personLogout.ip}<br/> * Mac : ${personLogout.mac}`
+          html: msg
         }
       });
 
@@ -206,7 +227,9 @@ export class LoginPageComponent implements OnInit, OnDestroy {
 
     // Daesang..
     this.fixedCompany = environment.companyConfig.fixedCompanyCode;
-    this.fixedNotiBtnText = '이용 주의사항';
+    this.fixedNotiBtnText = this.translateService.instant(
+      'accounts.usageNotes'
+    );
   }
 
   ngOnDestroy(): void {
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 982719d7..cabed623 100644
--- a/projects/ucap-webmessenger-app/src/app/services/notification.service.ts
+++ b/projects/ucap-webmessenger-app/src/app/services/notification.service.ts
@@ -113,6 +113,7 @@ import { MessageType } from '@ucap-webmessenger/api-message';
 import { LogoutInfo, KEY_LOGOUT_INFO } from '@app/types';
 import { TranslateService } from '@ngx-translate/core';
 import { deleteMessageSuccess } from '@app/store/messenger/message';
+import { ServerErrorCode } from '@ucap-webmessenger/protocol';
 
 @Injectable()
 export class AppNotificationService {
@@ -161,6 +162,12 @@ export class AppNotificationService {
                   'Notification::authenticationProtocolService::LogoutRemoteNotification',
                   noti
                 );
+
+                this.sessionStorageService.set<LogoutInfo>(KEY_LOGOUT_INFO, {
+                  personLogout: true,
+                  reasonCode: ServerErrorCode.ERRCD_FORCE_INIT,
+                  forceType: noti.requestDeviceType
+                } as LogoutInfo);
               }
               break;
             default:
diff --git a/projects/ucap-webmessenger-app/src/app/types/logout-info.type.ts b/projects/ucap-webmessenger-app/src/app/types/logout-info.type.ts
index b07b1575..b187b95f 100644
--- a/projects/ucap-webmessenger-app/src/app/types/logout-info.type.ts
+++ b/projects/ucap-webmessenger-app/src/app/types/logout-info.type.ts
@@ -5,4 +5,5 @@ export interface LogoutInfo {
   reasonCode?: number;
   ip?: string;
   mac?: string;
+  forceType?: string;
 }
diff --git a/projects/ucap-webmessenger-app/src/assets/i18n/en.json b/projects/ucap-webmessenger-app/src/assets/i18n/en.json
index bb276051..2e619836 100644
--- a/projects/ucap-webmessenger-app/src/assets/i18n/en.json
+++ b/projects/ucap-webmessenger-app/src/assets/i18n/en.json
@@ -15,11 +15,15 @@
     "consentOfPrivacy": "Agreement of ",
     "changePassword": "Change password",
     "resetPassword": "Reset password",
+    "usageNotes": "Usage Notes",
     "passwordExpired": "Password expired",
     "descriptionOfPasswordExpired": "Password has expired.<br/>Please change your password and log in again.",
     "confirmLogout": "Do you want to log out?",
     "results": {
-      "changedPassword": "Password changed. Please log in again."
+      "changedPassword": "Password changed. Please log in again.",
+      "doLogout": "You have been logged out.",
+      "doLogoutDuplicate": "You logged in from another device.<br/> * Ip : {{ip}}<br/> * Mac : {{mac}}",
+      "doLogoutByOthers": "Forced logout by user."
     },
     "errors": {
       "requireLoginId": "Login ID is required.",
@@ -38,7 +42,9 @@
       "notAllowedConsecutiveAlphaNumOver3TimesForPassword": "You cannot use consecutive numbers or letters more than 3 times.",
       "notSatisfiedCombineForPassword": "Combination of two or more kinds of letters, numbers and special characters.",
       "minLengthCombineForPassword": "Password must be {{lengthOfPassword}} characters if {{countOfCombine}} combination.",
-      "failToChangePassword": "Failed to change password."
+      "failToChangePassword": "Failed to change password.",
+      "loginFail": "Username or password do not match.",
+      "loginFailOverTry": "Password error count exceeded. <br/> Check your password <br/> Please try again later."
     }
   },
   "profile": {
@@ -203,6 +209,7 @@
     "btnAttachFile": "Attach files",
     "btnSticker": "Sticker",
     "btnTranslate": "Translate",
+    "noRoomUser": "No chat users",
     "event": {
       "inviteToRoomWith": "{{owner}} invited {{inviter}}.",
       "exitFromRoomWith": "{{exitor}} has left.",
diff --git a/projects/ucap-webmessenger-app/src/assets/i18n/ko.json b/projects/ucap-webmessenger-app/src/assets/i18n/ko.json
index ebc7fdd6..46465313 100644
--- a/projects/ucap-webmessenger-app/src/assets/i18n/ko.json
+++ b/projects/ucap-webmessenger-app/src/assets/i18n/ko.json
@@ -15,11 +15,15 @@
     "consentOfPrivacy": "개인정보 동의",
     "changePassword": "비밀번호 변경",
     "resetPassword": "비밀번호 초기화",
+    "usageNotes": "이용 주의사항",
     "passwordExpired": "비밀번호 만기",
     "descriptionOfPasswordExpired": "비밀번호가 만료되었습니다.<br/>비밀번호 변경 후 다시 로그인 하세요.",
     "confirmLogout": "로그아웃 하시겠습니까?",
     "results": {
-      "changedPassword": "비밀번호가 변경되었습니다. 다시 로그인하여 주십시오"
+      "changedPassword": "비밀번호가 변경되었습니다. 다시 로그인하여 주십시오",
+      "doLogout": "로그아웃 되었습니다.",
+      "doLogoutDuplicate": "다른 디바이스에서 로그인하였습니다.<br/> * Ip : {{ip}}<br/> * Mac : {{mac}}",
+      "doLogoutByOthers": "사용자에 의해 강제로그아웃 하였습니다."
     },
     "errors": {
       "requireLoginId": "로그인 아이디를 입력해 주세요.",
@@ -38,7 +42,9 @@
       "notAllowedConsecutiveAlphaNumOver3TimesForPassword": "연속되는 숫자나 문자를 3번이상 사용할 수 없습니다",
       "notSatisfiedCombineForPassword": "문자, 숫자, 특수문자 중 2종류 이상 조합을 해야 합니다",
       "minLengthCombineForPassword": "비밀번호는 {{countOfCombine}}가지가 조합된 경우 {{lengthOfPassword}}자를 넘어야 합니다",
-      "failToChangePassword": "비밀번호 변경에 실패하였습니다."
+      "failToChangePassword": "비밀번호 변경에 실패하였습니다.",
+      "loginFail": "아이디 또는 패스워드가<br/>일치하지 않습니다.",
+      "loginFailOverTry": "비밀번호 오류 횟수 초과입니다.<br/>비밀번호를 확인하신 후<br/>잠시 후 다시 시작해 주세요."
     }
   },
   "profile": {
@@ -203,6 +209,7 @@
     "btnAttachFile": "첨부파일",
     "btnSticker": "스티커",
     "btnTranslate": "번역",
+    "noRoomUser": "대화상대 없음",
     "event": {
       "inviteToRoomWith": "{{owner}}이 {{inviter}}을 초대했습니다.",
       "exitFromRoomWith": "{{exitor}}님이 퇴장하셨습니다.",
diff --git a/projects/ucap-webmessenger-protocol-authentication/src/lib/protocols/logout-remote.ts b/projects/ucap-webmessenger-protocol-authentication/src/lib/protocols/logout-remote.ts
index becaa8ad..f28104db 100644
--- a/projects/ucap-webmessenger-protocol-authentication/src/lib/protocols/logout-remote.ts
+++ b/projects/ucap-webmessenger-protocol-authentication/src/lib/protocols/logout-remote.ts
@@ -46,8 +46,10 @@ export const decodeLogoutRemote: ProtocolDecoder<LogoutRemoteResponse> = (
   } as LogoutRemoteResponse);
 };
 
-export const decodeLogoutRemoteNotification: ProtocolDecoder<
-  LogoutRemoteNotification
-> = (message: ProtocolMessage) => {
-  return { requestDeviceType: message.bodyList[0] } as LogoutRemoteNotification;
+export const decodeLogoutRemoteNotification: ProtocolDecoder<LogoutRemoteNotification> = (
+  message: ProtocolMessage
+) => {
+  return decodeProtocolMessage(message, {
+    requestDeviceType: message.bodyList[0]
+  } as LogoutRemoteNotification);
 };
diff --git a/projects/ucap-webmessenger-ui-room/src/lib/components/list-item.component.html b/projects/ucap-webmessenger-ui-room/src/lib/components/list-item.component.html
index ed30d890..142b87f2 100644
--- a/projects/ucap-webmessenger-ui-room/src/lib/components/list-item.component.html
+++ b/projects/ucap-webmessenger-ui-room/src/lib/components/list-item.component.html
@@ -51,7 +51,7 @@
                   {{ roomInfo.roomName }}
                 </ng-template>
                 <ng-template #roomNameNotExist>
-                  {{ _roomUserInfos | ucapTranslate: 'name':',' }}
+                  {{ getRoomNameByRoomUser(_roomUserInfos) }}
                 </ng-template>
               </ng-container>
             </ng-container>
@@ -94,6 +94,5 @@
     matBadgeOverlap="true"
     matBadgeColor="accent"
     matBadgePosition="below after"
-  >
-  </div>
+  ></div>
 </div>
diff --git a/projects/ucap-webmessenger-ui-room/src/lib/components/list-item.component.ts b/projects/ucap-webmessenger-ui-room/src/lib/components/list-item.component.ts
index ed2afc16..b14ec23f 100644
--- a/projects/ucap-webmessenger-ui-room/src/lib/components/list-item.component.ts
+++ b/projects/ucap-webmessenger-ui-room/src/lib/components/list-item.component.ts
@@ -4,7 +4,8 @@ import {
   Input,
   Output,
   EventEmitter,
-  ViewChildren
+  ViewChildren,
+  ChangeDetectorRef
 } from '@angular/core';
 import {
   RoomInfo,
@@ -15,8 +16,9 @@ import {
 import { NGXLogger } from 'ngx-logger';
 import { VersionInfo2Response } from '@ucap-webmessenger/api-public';
 import { LoginResponse } from '@ucap-webmessenger/protocol-authentication';
-import { FormsModule } from '@angular/forms';
-import { MatCheckbox } from '@angular/material';
+import { TranslatePipe } from 'projects/ucap-webmessenger-ui/src/lib/pipes/translate.pipe';
+import { TranslateService as uiTranslateService } from '@ucap-webmessenger/ui';
+import { TranslateService } from '@ngx-translate/core';
 
 @Component({
   selector: 'ucap-room-list-item',
@@ -50,7 +52,12 @@ export class ListItemComponent implements OnInit {
   finalEventMessage: string;
   RoomType = RoomType;
 
-  constructor(private logger: NGXLogger) {}
+  constructor(
+    private logger: NGXLogger,
+    private uiTranslateService: uiTranslateService,
+    private translateService: TranslateService,
+    private changeDetectorRef: ChangeDetectorRef
+  ) {}
 
   ngOnInit() {
     if (this.roomInfo.isTimeRoom) {
@@ -96,6 +103,18 @@ export class ListItemComponent implements OnInit {
       .sort((a, b) => (a.name < b.name ? -1 : a.name > b.name ? 1 : 0));
   }
 
+  getRoomNameByRoomUser(roomUserInfos: (RoomUserInfo | UserInfoShort)[]) {
+    let roomName = new TranslatePipe(
+      this.uiTranslateService,
+      this.changeDetectorRef
+    ).transform(roomUserInfos, 'name', ',');
+
+    if (!roomName || roomName.trim().length === 0) {
+      roomName = this.translateService.instant('chat.noRoomUser');
+    }
+    return roomName;
+  }
+
   // getChecked(value: boolean, roomInfo: RoomInfo) {
   //   if (value && !this.multiCheckable) {
   //     if (this.selected === roomInfo.roomSeq) {