diff --git a/src/app/+admin/admin-sidebar/admin-sidebar.component.ts b/src/app/+admin/admin-sidebar/admin-sidebar.component.ts
index eefc10c16e..3bfbf2de5b 100644
--- a/src/app/+admin/admin-sidebar/admin-sidebar.component.ts
+++ b/src/app/+admin/admin-sidebar/admin-sidebar.component.ts
@@ -357,7 +357,7 @@ export class AdminSidebarComponent extends MenuComponent implements OnInit {
 
     observableCombineLatest(
       this.authorizationService.isAuthorized(FeatureID.AdministratorOf),
-      this.scriptDataService.scriptWithNameExistsAndCanExecute(METADATA_EXPORT_SCRIPT_NAME)
+      // this.scriptDataService.scriptWithNameExistsAndCanExecute(METADATA_EXPORT_SCRIPT_NAME)
     ).pipe(
       // TODO uncomment when #635 (https://github.com/DSpace/dspace-angular/issues/635) is fixed; otherwise even in production mode, the metadata export button is only available after a refresh (and not in dev mode)
       // filter(([authorized, metadataExportScriptExists]: boolean[]) => authorized && metadataExportScriptExists),
@@ -416,7 +416,7 @@ export class AdminSidebarComponent extends MenuComponent implements OnInit {
 
     observableCombineLatest(
       this.authorizationService.isAuthorized(FeatureID.AdministratorOf),
-      this.scriptDataService.scriptWithNameExistsAndCanExecute(METADATA_IMPORT_SCRIPT_NAME)
+      // this.scriptDataService.scriptWithNameExistsAndCanExecute(METADATA_IMPORT_SCRIPT_NAME)
     ).pipe(
       // TODO uncomment when #635 (https://github.com/DSpace/dspace-angular/issues/635) is fixed
       // filter(([authorized, metadataImportScriptExists]: boolean[]) => authorized && metadataImportScriptExists),
diff --git a/src/app/shared/confirmation-modal/confirmation-modal.component.html b/src/app/shared/confirmation-modal/confirmation-modal.component.html
new file mode 100644
index 0000000000..bb67213ed3
--- /dev/null
+++ b/src/app/shared/confirmation-modal/confirmation-modal.component.html
@@ -0,0 +1,16 @@
+<div>
+  <div class="modal-header">{{ headerLabel | translate:{dsoName: dso?.name} }}
+    <button type="button" class="close" (click)="close()" aria-label="Close">
+      <span aria-hidden="true">×</span>
+    </button>
+  </div>
+  <div class="modal-body">
+    <p>{{ infoLabel | translate:{dsoName: dso?.name} }}</p>
+    <button type="button" class="cancel btn btn-secondary" (click)="cancelPressed()" aria-label="Cancel">
+      {{ cancelLabel | translate:{dsoName: dso?.name} }}
+    </button>
+    <button type="button" class="confirm btn btn-primary" (click)="confirmPressed()" aria-label="Confirm" ngbAutofocus>
+      {{ confirmLabel | translate:{dsoName: dso?.name} }}
+    </button>
+  </div>
+</div>
diff --git a/src/app/shared/confirmation-modal/confirmation-modal.component.spec.ts b/src/app/shared/confirmation-modal/confirmation-modal.component.spec.ts
new file mode 100644
index 0000000000..63930fc4ed
--- /dev/null
+++ b/src/app/shared/confirmation-modal/confirmation-modal.component.spec.ts
@@ -0,0 +1,117 @@
+import { DebugElement, NO_ERRORS_SCHEMA } from '@angular/core';
+import { async, ComponentFixture, fakeAsync, TestBed, tick } from '@angular/core/testing';
+import { By } from '@angular/platform-browser';
+import { NgbActiveModal } from '@ng-bootstrap/ng-bootstrap';
+import { TranslateModule } from '@ngx-translate/core';
+import { ConfirmationModalComponent } from './confirmation-modal.component';
+
+describe('ConfirmationModalComponent', () => {
+  let component: ConfirmationModalComponent;
+  let fixture: ComponentFixture<ConfirmationModalComponent>;
+  let debugElement: DebugElement;
+
+  const modalStub = jasmine.createSpyObj('modalStub', ['close']);
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      imports: [TranslateModule.forRoot()],
+      declarations: [ConfirmationModalComponent],
+      providers: [
+        { provide: NgbActiveModal, useValue: modalStub }
+      ],
+      schemas: [NO_ERRORS_SCHEMA]
+    }).compileComponents();
+
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(ConfirmationModalComponent);
+    component = fixture.componentInstance;
+    debugElement = fixture.debugElement;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+
+  describe('close', () => {
+    beforeEach(() => {
+      component.close();
+    });
+    it('should call the close method on the active modal', () => {
+      expect(modalStub.close).toHaveBeenCalled();
+    });
+  });
+
+  describe('confirmPressed', () => {
+    beforeEach(() => {
+      spyOn(component.response, 'emit');
+      component.confirmPressed();
+    });
+    it('should call the close method on the active modal', () => {
+      expect(modalStub.close).toHaveBeenCalled();
+    });
+    it('event emitter should emit true', () => {
+      expect(component.response.emit).toHaveBeenCalledWith(true);
+    });
+  });
+
+  describe('cancelPressed', () => {
+    beforeEach(() => {
+      spyOn(component.response, 'emit');
+      component.cancelPressed();
+    });
+    it('should call the close method on the active modal', () => {
+      expect(modalStub.close).toHaveBeenCalled();
+    });
+    it('event emitter should emit false', () => {
+      expect(component.response.emit).toHaveBeenCalledWith(false);
+    });
+  });
+
+  describe('when the click method emits on close button', () => {
+    beforeEach(fakeAsync(() => {
+      spyOn(component, 'close');
+      debugElement.query(By.css('button.close')).triggerEventHandler('click', {});
+      tick();
+      fixture.detectChanges();
+    }));
+    it('should call the close method on the component', () => {
+      expect(component.close).toHaveBeenCalled();
+    });
+  });
+
+  describe('when the click method emits on cancel button', () => {
+    beforeEach(fakeAsync(() => {
+      spyOn(component, 'close');
+      spyOn(component.response, 'emit');
+      debugElement.query(By.css('button.cancel')).triggerEventHandler('click', {});
+      tick();
+      fixture.detectChanges();
+    }));
+    it('should call the close method on the component', () => {
+      expect(component.close).toHaveBeenCalled();
+    });
+    it('event emitter should emit false', () => {
+      expect(component.response.emit).toHaveBeenCalledWith(false);
+    });
+  });
+
+  describe('when the click method emits on confirm button', () => {
+    beforeEach(fakeAsync(() => {
+      spyOn(component, 'close');
+      spyOn(component.response, 'emit');
+      debugElement.query(By.css('button.confirm')).triggerEventHandler('click', {});
+      tick();
+      fixture.detectChanges();
+    }));
+    it('should call the close method on the component', () => {
+      expect(component.close).toHaveBeenCalled();
+    });
+    it('event emitter should emit true', () => {
+      expect(component.response.emit).toHaveBeenCalledWith(true);
+    });
+  });
+
+});
diff --git a/src/app/shared/confirmation-modal/confirmation-modal.component.ts b/src/app/shared/confirmation-modal/confirmation-modal.component.ts
new file mode 100644
index 0000000000..e52d26021f
--- /dev/null
+++ b/src/app/shared/confirmation-modal/confirmation-modal.component.ts
@@ -0,0 +1,48 @@
+import { Component, EventEmitter, Input, Output } from '@angular/core';
+import { ActivatedRoute } from '@angular/router';
+import { NgbActiveModal, NgbModal } from '@ng-bootstrap/ng-bootstrap';
+import { DSpaceObject } from '../../core/shared/dspace-object.model';
+
+@Component({
+  selector: 'ds-confirmation-modal',
+  templateUrl: 'confirmation-modal.component.html',
+})
+export class ConfirmationModalComponent {
+  @Input() headerLabel: string;
+  @Input() infoLabel: string;
+  @Input() cancelLabel: string;
+  @Input() confirmLabel: string;
+  @Input() dso: DSpaceObject;
+
+  /**
+   * An event fired when the cancel or confirm button is clicked, with respectively false or true
+   */
+  @Output()
+  response = new EventEmitter<boolean>();
+
+  constructor(protected activeModal: NgbActiveModal) {
+  }
+
+  /**
+   * Confirm the action that led to the modal
+   */
+  confirmPressed() {
+    this.response.emit(true);
+    this.close();
+  }
+
+  /**
+   * Cancel the action that led to the modal and close modal
+   */
+  cancelPressed() {
+    this.response.emit(false);
+    this.close();
+  }
+
+  /**
+   * Close the modal
+   */
+  close() {
+    this.activeModal.close();
+  }
+}
diff --git a/src/app/shared/dso-selector/modal-wrappers/export-metadata-selector/export-metadata-selector.component.ts b/src/app/shared/dso-selector/modal-wrappers/export-metadata-selector/export-metadata-selector.component.ts
index 4fd01d52ef..647e77584c 100644
--- a/src/app/shared/dso-selector/modal-wrappers/export-metadata-selector/export-metadata-selector.component.ts
+++ b/src/app/shared/dso-selector/modal-wrappers/export-metadata-selector/export-metadata-selector.component.ts
@@ -4,16 +4,19 @@ import { TranslateService } from '@ngx-translate/core';
 import { Observable } from 'rxjs/internal/Observable';
 import { take, map } from 'rxjs/operators';
 import { of as observableOf } from 'rxjs';
+import { AuthService } from '../../../../core/auth/auth.service';
 import { METADATA_EXPORT_SCRIPT_NAME, ScriptDataService } from '../../../../core/data/processes/script-data.service';
 import { RequestEntry } from '../../../../core/data/request.reducer';
 import { Collection } from '../../../../core/shared/collection.model';
 import { Community } from '../../../../core/shared/community.model';
 import { DSpaceObjectType } from '../../../../core/shared/dspace-object-type.model';
 import { DSpaceObject } from '../../../../core/shared/dspace-object.model';
-import { NgbActiveModal } from '@ng-bootstrap/ng-bootstrap';
+import { NgbActiveModal, NgbModal } from '@ng-bootstrap/ng-bootstrap';
 import { ProcessParameter } from '../../../../process-page/processes/process-parameter.model';
+import { ConfirmationModalComponent } from '../../../confirmation-modal/confirmation-modal.component';
 import { isNotEmpty } from '../../../empty.util';
 import { NotificationsService } from '../../../notifications/notifications.service';
+import { createSuccessfulRemoteDataObject } from '../../../remote-data.utils';
 import { DSOSelectorModalWrapperComponent, SelectorActionType } from '../dso-selector-modal-wrapper.component';
 
 /**
@@ -21,7 +24,7 @@ import { DSOSelectorModalWrapperComponent, SelectorActionType } from '../dso-sel
  * Used to choose a dso from to export metadata of
  */
 @Component({
-  selector: 'ds-edit-item-selector',
+  selector: 'ds-export-metadata-selector',
   templateUrl: '../dso-selector-modal-wrapper.component.html',
 })
 export class ExportMetadataSelectorComponent extends DSOSelectorModalWrapperComponent implements OnInit {
@@ -31,7 +34,8 @@ export class ExportMetadataSelectorComponent extends DSOSelectorModalWrapperComp
 
   constructor(protected activeModal: NgbActiveModal, protected route: ActivatedRoute, private router: Router,
               protected notificationsService: NotificationsService, protected translationService: TranslateService,
-              protected scriptDataService: ScriptDataService) {
+              protected scriptDataService: ScriptDataService,
+              private modalService: NgbModal) {
     super(activeModal, route);
   }
 
@@ -41,9 +45,23 @@ export class ExportMetadataSelectorComponent extends DSOSelectorModalWrapperComp
    */
   navigate(dso: DSpaceObject): Observable<boolean> {
     if (dso instanceof Collection || dso instanceof Community) {
-      const startScriptSucceeded = this.startScriptNotifyAndRedirect(dso, dso.handle);
-      startScriptSucceeded.pipe(take(1)).subscribe();
-      return startScriptSucceeded;
+      const modalRef = this.modalService.open(ConfirmationModalComponent);
+      modalRef.componentInstance.dso = dso;
+      modalRef.componentInstance.headerLabel = "confirmation-modal.export-metadata.header";
+      modalRef.componentInstance.infoLabel = "confirmation-modal.export-metadata.info";
+      modalRef.componentInstance.cancelLabel = "confirmation-modal.export-metadata.cancel";
+      modalRef.componentInstance.confirmLabel = "confirmation-modal.export-metadata.confirm";
+
+      modalRef.componentInstance.response.subscribe((confirm: boolean) => {
+        if (confirm) {
+          const startScriptSucceeded = this.startScriptNotifyAndRedirect(dso, dso.handle);
+          startScriptSucceeded.pipe(take(1)).subscribe();
+          return startScriptSucceeded;
+        } else {
+          const modalRef = this.modalService.open(ExportMetadataSelectorComponent);
+          modalRef.componentInstance.dsoRD = createSuccessfulRemoteDataObject(dso);
+        }
+      });
     } else {
       this.notificationsService.error(this.translationService.get('dso-selector.export-metadata.notValidDSO'));
       return observableOf(false);
diff --git a/src/app/shared/file-dropzone-no-uploader/file-dropzone-no-uploader.component.ts b/src/app/shared/file-dropzone-no-uploader/file-dropzone-no-uploader.component.ts
index 473250d9f6..0ce822bc0e 100644
--- a/src/app/shared/file-dropzone-no-uploader/file-dropzone-no-uploader.component.ts
+++ b/src/app/shared/file-dropzone-no-uploader/file-dropzone-no-uploader.component.ts
@@ -51,15 +51,17 @@ export class FileDropzoneNoUploaderComponent implements OnInit {
   ngOnInit() {
     this.uploaderId = 'ds-drag-and-drop-uploader' + uniqueId();
     this.isOverDocumentDropZone = observableOf(false);
-    window.addEventListener('drop', (e: DragEvent) => {
-      return e && e.preventDefault();
-    }, false);
     this.uploader = new FileUploader({
       // required, but using onFileDrop, not uploader
       url: 'placeholder',
     });
   }
 
+  @HostListener('window:drop', ['$event'])
+  onDrop(event: any) {
+    event.preventDefault();
+  }
+
   @HostListener('window:dragover', ['$event'])
   onDragOver(event: any) {
     // Show drop area on the page
diff --git a/src/app/shared/shared.module.ts b/src/app/shared/shared.module.ts
index 8e4e958097..66bdea9217 100644
--- a/src/app/shared/shared.module.ts
+++ b/src/app/shared/shared.module.ts
@@ -10,6 +10,7 @@ import { MissingTranslationHandler, TranslateModule } from '@ngx-translate/core'
 
 import { NgxPaginationModule } from 'ngx-pagination';
 import { ComcolRoleComponent } from './comcol-forms/edit-comcol-page/comcol-role/comcol-role.component';
+import { ConfirmationModalComponent } from './confirmation-modal/confirmation-modal.component';
 import { ExportMetadataSelectorComponent } from './dso-selector/modal-wrappers/export-metadata-selector/export-metadata-selector.component';
 import { FileDropzoneNoUploaderComponent } from './file-dropzone-no-uploader/file-dropzone-no-uploader.component';
 import { PublicationListElementComponent } from './object-list/item-list-element/item-types/publication/publication-list-element.component';
@@ -401,7 +402,8 @@ const COMPONENTS = [
   GroupSearchBoxComponent,
   FileDownloadLinkComponent,
   CollectionDropdownComponent,
-  ExportMetadataSelectorComponent
+  ExportMetadataSelectorComponent,
+  ConfirmationModalComponent
 ];
 
 const ENTRY_COMPONENTS = [
@@ -478,7 +480,8 @@ const ENTRY_COMPONENTS = [
   ClaimedTaskActionsEditMetadataComponent,
   FileDownloadLinkComponent,
   CurationFormComponent,
-  ExportMetadataSelectorComponent
+  ExportMetadataSelectorComponent,
+  ConfirmationModalComponent
 ];
 
 const SHARED_ITEM_PAGE_COMPONENTS = [
diff --git a/src/assets/i18n/en.json5 b/src/assets/i18n/en.json5
index a77abbcbd4..d1816847fb 100644
--- a/src/assets/i18n/en.json5
+++ b/src/assets/i18n/en.json5
@@ -995,6 +995,16 @@
 
 
 
+  "confirmation-modal.export-metadata.header": "Export metadata for {{ dsoName }}",
+
+  "confirmation-modal.export-metadata.info": "Are you sure you want to export metadata for {{ dsoName }}",
+
+  "confirmation-modal.export-metadata.cancel": "Cancel",
+
+  "confirmation-modal.export-metadata.confirm": "Export",
+
+
+
   "error.bitstream": "Error fetching bitstream",
 
   "error.browse-by": "Error fetching items",
diff --git a/src/environments/mock-environment.ts b/src/environments/mock-environment.ts
index 6e4d60e268..57a747f374 100644
--- a/src/environments/mock-environment.ts
+++ b/src/environments/mock-environment.ts
@@ -105,7 +105,7 @@ export const environment: Partial<GlobalConfig> = {
   },
   // Angular Universal settings
   universal: {
-    preboot: true,
+    preboot: false,
     async: true,
     time: false
   },