diff --git a/projects/ucap-webmessenger-app/src/app/guards/auto-login.guard.ts b/projects/ucap-webmessenger-app/src/app/guards/auto-login.guard.ts
index bc462712..038b77c8 100644
--- a/projects/ucap-webmessenger-app/src/app/guards/auto-login.guard.ts
+++ b/projects/ucap-webmessenger-app/src/app/guards/auto-login.guard.ts
@@ -50,7 +50,7 @@ export class AppAutoLoginGuard implements CanActivate {
       if (
         !!appUserInfo &&
         appUserInfo.settings.general.autoLogin &&
-        !personLogout.personLogout
+        !(!!personLogout && !!personLogout.personLogout)
       ) {
         this.store.dispatch(
           AuthenticationStore.webLogin({
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-side.component.html b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-side.component.html
index ffc37043..8e139922 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-side.component.html
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-side.component.html
@@ -186,6 +186,7 @@
         (sendCall)="onClickSendClickToCall($event)"
         (sendSms)="onClickSendSms($event)"
         (toggleUser)="onToggleUser($event)"
+        (resetSelectedUserList)="onResetSelectedUserList($event)"
         class="organization-side"
       ></app-layout-chat-left-sidenav-organization>
     </div>
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-side.component.ts b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-side.component.ts
index 9c9a168f..aad4ba97 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-side.component.ts
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-side.component.ts
@@ -403,6 +403,11 @@ export class LeftSideComponent implements OnInit, OnDestroy {
       );
     }
   }
+  onResetSelectedUserList(
+    selectedUserList: (UserInfo | UserInfoSS | UserInfoF | UserInfoDN)[]
+  ) {
+    this.selectedUserList = selectedUserList;
+  }
 
   /** FAB */
   onClickFab(params: { btn: any }) {
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.ts b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.ts
index 6e592394..7403cfce 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.ts
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.ts
@@ -41,22 +41,27 @@ import {
 } from '@app/types';
 import { take, map, tap, delay, catchError } from 'rxjs/operators';
 import { VersionInfo2Response } from '@ucap-webmessenger/api-public';
-import {
-  SelectGroupDialogComponent,
-  SelectGroupDialogData,
-  SelectGroupDialogResult
-} from '../../dialogs/group/select-group.dialog.component';
 import { LoginResponse } from '@ucap-webmessenger/protocol-authentication';
 import { Company } from '@ucap-webmessenger/api-external';
 import { PerfectScrollbarDirective } from 'ngx-perfect-scrollbar';
 import { CdkVirtualScrollViewport } from '@angular/cdk/scrolling';
 import { MatMenuTrigger } from '@angular/material';
+import { TranslateService } from '@ngx-translate/core';
 import {
   MessageWriteDialogComponent,
   MessageWriteDialogResult,
   MessageWriteDialogData
 } from '../../dialogs/message/message-write.dialog.component';
-import { TranslateService } from '@ngx-translate/core';
+import {
+  SelectGroupDialogComponent,
+  SelectGroupDialogResult,
+  SelectGroupDialogData
+} from '../../dialogs/group/select-group.dialog.component';
+import {
+  SelectedUserListDialogComponent,
+  SelectedUserListDialogResult,
+  SelectedUserListDialogData
+} from '../../dialogs/organization/selected-user-list.dialog.component';
 
 @Component({
   selector: 'app-layout-chat-left-sidenav-organization',
@@ -99,6 +104,10 @@ export class OrganizationComponent
     userInfos: (UserInfo | UserInfoSS | UserInfoF | UserInfoDN)[];
   }>();
   @Output()
+  resetSelectedUserList = new EventEmitter<
+    (UserInfo | UserInfoSS | UserInfoF | UserInfoDN)[]
+  >();
+  @Output()
   openProfile = new EventEmitter<{ userSeq: number }>();
   @Output()
   sendCall = new EventEmitter<string>();
@@ -411,8 +420,25 @@ export class OrganizationComponent
     this.sendCall.emit(calleeNumber);
   }
 
-  onClickShowSelectedUserList() {
+  async onClickShowSelectedUserList() {
     this.logger.debug('onClickShowSelectedUserList', this.selectedUserList);
+
+    const result = await this.dialogService.open<
+      SelectedUserListDialogComponent,
+      SelectedUserListDialogData,
+      SelectedUserListDialogResult
+    >(SelectedUserListDialogComponent, {
+      data: {
+        title: '선택된 유저',
+        selectedUserList: this.selectedUserList
+      }
+    });
+
+    if (!!result && !!result.choice && result.choice) {
+      if (!!result.selectedUserList) {
+        this.resetSelectedUserList.emit(result.selectedUserList);
+      }
+    }
   }
 
   async onClickAddGroup() {
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/index.ts b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/index.ts
index 093e4297..6f4430e9 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/index.ts
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/index.ts
@@ -3,6 +3,7 @@ import { DIALOGS as CHAT_DIALOGS } from './chat';
 import { DIALOGS as GROUP_DIALOGS } from './group';
 import { DIALOGS as MESSAGE_DIALOGS } from './message';
 import { DIALOGS as NOTICE_DIALOGS } from './notice';
+import { DIALOGS as ORGANIZATION_DIALOGS } from './organization';
 import { DIALOGS as PROFILE_DIALOGS } from './profile';
 import { DIALOGS as SETTINGS_DIALOGS } from './settings';
 
@@ -12,6 +13,7 @@ export const DIALOGS = [
   ...GROUP_DIALOGS,
   ...MESSAGE_DIALOGS,
   ...NOTICE_DIALOGS,
+  ...ORGANIZATION_DIALOGS,
   ...PROFILE_DIALOGS,
   ...SETTINGS_DIALOGS
 ];
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/organization/index.ts b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/organization/index.ts
new file mode 100644
index 00000000..27cf34ce
--- /dev/null
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/organization/index.ts
@@ -0,0 +1,3 @@
+import { SelectedUserListDialogComponent } from './selected-user-list.dialog.component';
+
+export const DIALOGS = [SelectedUserListDialogComponent];
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/organization/selected-user-list.dialog.component.html b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/organization/selected-user-list.dialog.component.html
new file mode 100644
index 00000000..c533b4f5
--- /dev/null
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/organization/selected-user-list.dialog.component.html
@@ -0,0 +1,66 @@
+<mat-card class="confirm-card mat-elevation-z">
+  <mat-card-header>
+    <mat-card-title>
+      {{ data.title }}
+      <span class="count">
+        {{ selectedUserList.length }} / {{ data.selectedUserList.length }}
+      </span>
+      <mat-checkbox
+        #checkbox
+        labelPosition="before"
+        [checked]="
+          selectedUserList.length === data.selectedUserList.length &&
+          data.selectedUserList.length > 0
+        "
+        (change)="onCheckAllUser(checkbox.checked)"
+        (click)="$event.stopPropagation()"
+      >
+        전체선택
+      </mat-checkbox>
+    </mat-card-title>
+  </mat-card-header>
+  <mat-card-content>
+    <div class="item-list">
+      <cdk-virtual-scroll-viewport
+        itemSize="80"
+        #cvsvDeptUser
+        perfectScrollbar
+        fxFlexFill
+      >
+        <ucap-profile-user-list-item
+          *cdkVirtualFor="let userInfo of data.selectedUserList"
+          [userInfo]="userInfo"
+          [sessionVerinfo]="sessionVerinfo"
+          [selectedUserList]="selectedUserList"
+          [checkable]="userInfo.seq !== loginRes.userSeq"
+          [checkDisabled]="false"
+          [isChecked]="getCheckedUser(userInfo)"
+          (checkUser)="onCheckUser($event)"
+          (click)="onToggleUser(userInfo)"
+          (openProfile)="onClickOpenProfile($event)"
+          [matTooltip]="
+            userInfo.companyName +
+            ' / ' +
+            userInfo.lineNumber +
+            ' / ' +
+            userInfo.hpNumber
+          "
+          matTooltipPosition="after"
+        >
+        </ucap-profile-user-list-item>
+      </cdk-virtual-scroll-viewport>
+    </div>
+  </mat-card-content>
+  <mat-card-actions class="button-farm flex-row">
+    <button
+      mat-stroked-button
+      (click)="onClickChoice(false)"
+      class="mat-primary"
+    >
+      취소
+    </button>
+    <button mat-flat-button (click)="onClickChoice(true)" class="mat-primary">
+      적용
+    </button>
+  </mat-card-actions>
+</mat-card>
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/organization/selected-user-list.dialog.component.scss b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/organization/selected-user-list.dialog.component.scss
new file mode 100644
index 00000000..cc1fc087
--- /dev/null
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/organization/selected-user-list.dialog.component.scss
@@ -0,0 +1,18 @@
+::ng-deep .mat-card-header-tex {
+  margin: 0;
+}
+
+.confirm-card {
+  min-width: 500px;
+  .mat-card-content {
+    .item-list {
+      height: 450px;
+    }
+  }
+  .button-farm {
+    text-align: right;
+    .mat-primary {
+      margin-left: 4px;
+    }
+  }
+}
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/organization/selected-user-list.dialog.component.spec.ts b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/organization/selected-user-list.dialog.component.spec.ts
new file mode 100644
index 00000000..861eecbc
--- /dev/null
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/organization/selected-user-list.dialog.component.spec.ts
@@ -0,0 +1,24 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { SelectedUserListDialogComponent } from './selected-user-list.dialog.component';
+
+describe('app::layouts::messenger::SelectedUserListDialogComponent', () => {
+  let component: SelectedUserListDialogComponent;
+  let fixture: ComponentFixture<SelectedUserListDialogComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [SelectedUserListDialogComponent]
+    }).compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(SelectedUserListDialogComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/organization/selected-user-list.dialog.component.ts b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/organization/selected-user-list.dialog.component.ts
new file mode 100644
index 00000000..eb3d496f
--- /dev/null
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/dialogs/organization/selected-user-list.dialog.component.ts
@@ -0,0 +1,120 @@
+import { Component, OnInit, Inject } from '@angular/core';
+import { MatDialogRef, MAT_DIALOG_DATA } from '@angular/material';
+import { UserInfo } from '@ucap-webmessenger/protocol-sync';
+import {
+  UserInfoSS,
+  UserInfoF,
+  UserInfoDN
+} from '@ucap-webmessenger/protocol-query';
+import { VersionInfo2Response } from '@ucap-webmessenger/api-public';
+import { LoginResponse } from '@ucap-webmessenger/protocol-authentication';
+import { SessionStorageService } from '@ucap-webmessenger/web-storage';
+import { KEY_VER_INFO, KEY_LOGIN_RES_INFO } from '@app/types';
+
+export interface SelectedUserListDialogData {
+  title: string;
+  /** 선택된 사용자의 리스트 */
+  selectedUserList?: (UserInfo | UserInfoSS | UserInfoF | UserInfoDN)[];
+}
+
+export interface SelectedUserListDialogResult {
+  choice: boolean;
+  selectedUserList?: (UserInfo | UserInfoSS | UserInfoF | UserInfoDN)[];
+}
+
+@Component({
+  selector: 'app-layout-messenger-selected-user-list',
+  templateUrl: './selected-user-list.dialog.component.html',
+  styleUrls: ['./selected-user-list.dialog.component.scss']
+})
+export class SelectedUserListDialogComponent implements OnInit {
+  selectedUserList: (UserInfo | UserInfoSS | UserInfoF | UserInfoDN)[] = [];
+
+  loginRes: LoginResponse;
+  sessionVerinfo: VersionInfo2Response;
+
+  constructor(
+    public dialogRef: MatDialogRef<
+      SelectedUserListDialogData,
+      SelectedUserListDialogResult
+    >,
+    @Inject(MAT_DIALOG_DATA) public data: SelectedUserListDialogData,
+    private sessionStorageService: SessionStorageService
+  ) {
+    this.loginRes = this.sessionStorageService.get<LoginResponse>(
+      KEY_LOGIN_RES_INFO
+    );
+    this.sessionVerinfo = this.sessionStorageService.get<VersionInfo2Response>(
+      KEY_VER_INFO
+    );
+  }
+
+  ngOnInit(): void {
+    this.selectedUserList = this.data.selectedUserList;
+  }
+
+  /** 전체선택 이벤트 */
+  onCheckAllUser(value: boolean) {
+    if (!!value) {
+      this.selectedUserList = this.data.selectedUserList;
+    } else {
+      this.selectedUserList = [];
+    }
+  }
+
+  /** 리스트 checkable 할 경우 checkbox 의 isChecked 를 관장하며 리스트의 전체선택 여부를 판단한다. */
+  getCheckedUser(userInfo: UserInfo | UserInfoSS | UserInfoF | UserInfoDN) {
+    if (!!this.selectedUserList && this.selectedUserList.length > 0) {
+      return (
+        this.selectedUserList.filter(item => item.seq === userInfo.seq).length >
+        0
+      );
+    }
+    return false;
+  }
+
+  /** 리스트가 checkable 할 경우 checkbox 의 change 이벤트를 상위 컴포넌트로 전달한다. */
+  onCheckUser(params: {
+    isChecked: boolean;
+    userInfo: UserInfo | UserInfoSS | UserInfoF | UserInfoDN;
+  }) {
+    if (params.isChecked) {
+      if (
+        params.userInfo &&
+        this.selectedUserList.filter(user => user.seq === params.userInfo.seq)
+          .length === 0
+      ) {
+        this.selectedUserList = [...this.selectedUserList, params.userInfo];
+      }
+    } else {
+      this.selectedUserList = this.selectedUserList.filter(
+        user => user.seq !== params.userInfo.seq
+      );
+    }
+  }
+  onToggleUser(userInfo: UserInfo | UserInfoSS | UserInfoF | UserInfoDN) {
+    if (userInfo.seq === this.loginRes.userSeq) {
+      return;
+    }
+
+    if (
+      this.selectedUserList.filter(user => user.seq === userInfo.seq).length ===
+      0
+    ) {
+      this.selectedUserList = [...this.selectedUserList, userInfo];
+    } else {
+      this.selectedUserList = this.selectedUserList.filter(
+        item => item.seq !== userInfo.seq
+      );
+    }
+  }
+
+  onClickOpenProfile(userSeq: number) {}
+
+  onClickChoice(choice: boolean): void {
+    this.dialogRef.close({
+      choice,
+      selectedUserList: this.selectedUserList
+    });
+  }
+}
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/native/components/top-bar.component.html b/projects/ucap-webmessenger-app/src/app/layouts/native/components/top-bar.component.html
index 7da7cea5..9edc0d6a 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/native/components/top-bar.component.html
+++ b/projects/ucap-webmessenger-app/src/app/layouts/native/components/top-bar.component.html
@@ -351,6 +351,9 @@
       확대
     </button>
   </div> -->
+  <div class="setting">
+    <button mat-menu-item (click)="onClickNotice()">공지사항</button>
+  </div>
   <div class="setting">
     <button mat-menu-item (click)="onClickSettings()">설정</button>
   </div>