diff --git a/dmp-backend/core/src/main/java/eu/eudat/service/tenant/TenantServiceImpl.java b/dmp-backend/core/src/main/java/eu/eudat/service/tenant/TenantServiceImpl.java
index 8d14c33b3..b05211a6a 100644
--- a/dmp-backend/core/src/main/java/eu/eudat/service/tenant/TenantServiceImpl.java
+++ b/dmp-backend/core/src/main/java/eu/eudat/service/tenant/TenantServiceImpl.java
@@ -29,7 +29,6 @@ import gr.cite.tools.fieldset.BaseFieldSet;
 import gr.cite.tools.fieldset.FieldSet;
 import gr.cite.tools.logging.LoggerService;
 import gr.cite.tools.logging.MapLogEntry;
-import gr.cite.tools.validation.ValidationService;
 import jakarta.persistence.EntityManager;
 import org.jetbrains.annotations.NotNull;
 import org.slf4j.LoggerFactory;
@@ -68,7 +67,6 @@ public class TenantServiceImpl implements TenantService {
     private final ResponseUtilsService responseUtilsService;
     private final XmlHandlingService xmlHandlingService;
     private final ErrorThesaurusProperties errors;
-    private final ValidationService validationService;
     private final EncryptionService encryptionService;
 
     private final TenantProperties properties;
@@ -84,7 +82,7 @@ public class TenantServiceImpl implements TenantService {
             ResponseUtilsService responseUtilsService,
             XmlHandlingService xmlHandlingService,
             ErrorThesaurusProperties errors,
-            ValidationService validationService, EncryptionService encryptionService, TenantProperties properties) {
+            EncryptionService encryptionService, TenantProperties properties) {
         this.entityManager = entityManager;
         this.authorizationService = authorizationService;
         this.deleterFactory = deleterFactory;
@@ -95,7 +93,6 @@ public class TenantServiceImpl implements TenantService {
         this.responseUtilsService = responseUtilsService;
         this.xmlHandlingService = xmlHandlingService;
         this.errors = errors;
-        this.validationService = validationService;
         this.encryptionService = encryptionService;
         this.properties = properties;
     }
diff --git a/dmp-backend/web/src/main/java/eu/eudat/controllers/v2/DescriptionController.java b/dmp-backend/web/src/main/java/eu/eudat/controllers/v2/DescriptionController.java
index e9c4aa2f0..757a2d9d1 100644
--- a/dmp-backend/web/src/main/java/eu/eudat/controllers/v2/DescriptionController.java
+++ b/dmp-backend/web/src/main/java/eu/eudat/controllers/v2/DescriptionController.java
@@ -7,7 +7,6 @@ import eu.eudat.commons.enums.DmpAccessType;
 import eu.eudat.commons.enums.DmpStatus;
 import eu.eudat.commons.enums.IsActive;
 import eu.eudat.commons.validation.ValidationFilterAnnotation;
-import eu.eudat.file.transformer.model.file.FileFormat;
 import eu.eudat.model.Description;
 import eu.eudat.model.Dmp;
 import eu.eudat.model.PublicDescription;
@@ -21,8 +20,6 @@ import eu.eudat.query.DescriptionQuery;
 import eu.eudat.query.DmpQuery;
 import eu.eudat.query.lookup.DescriptionLookup;
 import eu.eudat.service.description.DescriptionService;
-import eu.eudat.service.description.DescriptionServiceImpl;
-import eu.eudat.service.dmp.DmpService;
 import eu.eudat.service.elastic.ElasticQueryHelperService;
 import eu.eudat.service.transformer.FileTransformerService;
 import gr.cite.tools.auditing.AuditService;
diff --git a/dmp-frontend/src/app/core/model/user/user.ts b/dmp-frontend/src/app/core/model/user/user.ts
index 8e95be828..40d3f965d 100644
--- a/dmp-frontend/src/app/core/model/user/user.ts
+++ b/dmp-frontend/src/app/core/model/user/user.ts
@@ -63,3 +63,9 @@ export interface UserCredential {
 	user: User;
 	createdAt: Date;
 }
+
+export interface DmpAssociatedUser {
+	id: Guid;
+	name: string;
+	email: string;
+}
diff --git a/dmp-frontend/src/app/core/services/user/user.service.ts b/dmp-frontend/src/app/core/services/user/user.service.ts
index 2506ba5ec..ba382f705 100644
--- a/dmp-frontend/src/app/core/services/user/user.service.ts
+++ b/dmp-frontend/src/app/core/services/user/user.service.ts
@@ -1,7 +1,7 @@
 import { HttpClient, HttpHeaders, HttpResponse } from '@angular/common/http';
 import { Injectable } from '@angular/core';
 import { IsActive } from '@app/core/common/enum/is-active.enum';
-import { User, UserPersist, UserRolePatchPersist } from '@app/core/model/user/user';
+import { DmpAssociatedUser, User, UserPersist, UserRolePatchPersist } from '@app/core/model/user/user';
 import { UserLookup } from '@app/core/query/user.lookup';
 import { MultipleAutoCompleteConfiguration } from '@app/library/auto-complete/multiple/multiple-auto-complete-configuration';
 import { SingleAutoCompleteConfiguration } from '@app/library/auto-complete/single/single-auto-complete-configuration';
@@ -31,6 +31,11 @@ export class UserService {
 		return this.http.post<QueryResult<User>>(url, q).pipe(catchError((error: any) => throwError(error)));
 	}
 
+	queryDmpAssociated(q: UserLookup): Observable<QueryResult<DmpAssociatedUser>> {
+		const url = `${this.apiBase}/dmp-associated/query`;
+		return this.http.post<QueryResult<DmpAssociatedUser>>(url, q).pipe(catchError((error: any) => throwError(error)));
+	}
+
 	getSingle(id: Guid, reqFields: string[] = []): Observable<User> {
 		const url = `${this.apiBase}/${id}`;
 		const options = { params: { f: reqFields } };
diff --git a/dmp-frontend/src/app/ui/dmp/invitation/dialog/dmp-invitation-dialog.component.html b/dmp-frontend/src/app/ui/dmp/invitation/dialog/dmp-invitation-dialog.component.html
index a38fae529..a706a3dd4 100644
--- a/dmp-frontend/src/app/ui/dmp/invitation/dialog/dmp-invitation-dialog.component.html
+++ b/dmp-frontend/src/app/ui/dmp/invitation/dialog/dmp-invitation-dialog.component.html
@@ -21,7 +21,7 @@
 				<mat-form-field class="select-role">
 					<mat-select [formControl]="formGroup.get('role')">
 						<mat-option [value]="dmpUserRoleEnum.Owner">{{enumUtils.toDmpUserRoleString(dmpUserRoleEnum.Owner)}}</mat-option>
-						<mat-option [value]="dmpUserRoleEnum.Member">{{enumUtils.toDmpUserRoleString(dmpUserRoleEnum.Member)}}</mat-option>
+						<mat-option [value]="dmpUserRoleEnum.User">{{enumUtils.toDmpUserRoleString(dmpUserRoleEnum.User)}}</mat-option>
 					</mat-select>
 				</mat-form-field>
 			</div>
diff --git a/dmp-frontend/src/app/ui/dmp/invitation/dialog/dmp-invitation-dialog.component.scss b/dmp-frontend/src/app/ui/dmp/invitation/dialog/dmp-invitation-dialog.component.scss
index 78ac33791..2e0d5a2a7 100644
--- a/dmp-frontend/src/app/ui/dmp/invitation/dialog/dmp-invitation-dialog.component.scss
+++ b/dmp-frontend/src/app/ui/dmp/invitation/dialog/dmp-invitation-dialog.component.scss
@@ -73,7 +73,7 @@
 	}
 
 	.select-role {
-		width: 20% !important;
+		width: 50% !important;
 		font-size: 14px;
 		color: #848484;
 		height: min-content;
diff --git a/dmp-frontend/src/app/ui/dmp/invitation/dialog/dmp-invitation-dialog.component.ts b/dmp-frontend/src/app/ui/dmp/invitation/dialog/dmp-invitation-dialog.component.ts
index 3378c5425..a67400936 100644
--- a/dmp-frontend/src/app/ui/dmp/invitation/dialog/dmp-invitation-dialog.component.ts
+++ b/dmp-frontend/src/app/ui/dmp/invitation/dialog/dmp-invitation-dialog.component.ts
@@ -6,8 +6,8 @@ import { MAT_DIALOG_DATA, MatDialogRef } from '@angular/material/dialog';
 import { ActivatedRoute, Router } from '@angular/router';
 import { DmpUserRole } from '@app/core/common/enum/dmp-user-role';
 import { IsActive } from '@app/core/common/enum/is-active.enum';
-import { DmpUserInvitePersist } from '@app/core/model/dmp/dmp';
-import { User } from '@app/core/model/user/user';
+import { DmpUserInvitePersist, DmpUserInviteTypePersist } from '@app/core/model/dmp/dmp';
+import { DmpAssociatedUser, User } from '@app/core/model/user/user';
 import { UserLookup } from '@app/core/query/user.lookup';
 import { DmpService } from '@app/core/services/dmp/dmp.service';
 import { SnackBarNotificationLevel, UiNotificationService } from '@app/core/services/notification/ui-notification-service';
@@ -43,7 +43,7 @@ export class DmpInvitationDialogComponent extends BaseComponent implements OnIni
 		titleFn: (item) => typeof (item) === 'string' ? item : item.name,
 		subtitleFn: (item) => item.email,
 		valueAssign: (item) => {
-			const result = typeof (item) === 'string' ? item : item.email;
+			const result = typeof (item) === 'string' ? item : item.id;
 			return result;
 		},
 		autoSelectFirstOptionOnBlur: true,
@@ -79,7 +79,26 @@ export class DmpInvitationDialogComponent extends BaseComponent implements OnIni
 
 	send() {
 		if (!this.formGroup.valid) { return; }
-		const value: DmpUserInvitePersist = this.formGroup.value;
+		let inviteTypeValues: DmpUserInviteTypePersist[] = [];
+		this.formGroup.get('users').value.forEach(x => {
+			let inviteType: DmpUserInviteTypePersist;
+			if (!(/^(\{){0,1}[0-9a-fA-F]{8}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{12}(\}){0,1}$/).test(x)) {
+				inviteType = {
+					userId: null,
+					email: x
+				};
+			}else{
+				inviteType = {
+					userId: Guid.parse(x),
+					email: null
+				};
+			}
+			inviteTypeValues.push(inviteType)
+		})
+		const value: DmpUserInvitePersist = {
+			role: this.formGroup.get('role').value,
+			users: inviteTypeValues
+		}
 		// invitationObject.users.push(...(<any[]>this.formGroup.get('users').value).filter(user => typeof (user) === 'string').map(email => ({ email: email, name: email })));
 		// invitationObject.users.push(...(<any[]>this.formGroup.get('users').value).filter(user => typeof (user) !== 'string'));
 		// this.emails.forEach(email => {
@@ -101,8 +120,7 @@ export class DmpInvitationDialogComponent extends BaseComponent implements OnIni
 		this.dialogRef.close();
 	}
 
-	filterUsers(like: string): Observable<User[]> {
-		//TODO: refactor. Change with a service that provides a list of the users assosiated with your account.
+	filterUsers(like: string): Observable<DmpAssociatedUser[]> {
 		const lookup: UserLookup = new UserLookup();
 		lookup.page = { size: 100, offset: 0 };
 		// if (excludedIds && excludedIds.length > 0) { lookup.excludedIds = excludedIds; }
@@ -116,7 +134,7 @@ export class DmpInvitationDialogComponent extends BaseComponent implements OnIni
 		};
 		lookup.order = { items: [nameof<User>(x => x.name)] };
 		if (like) { lookup.like = this.filterService.transformLike(like); }
-		return this.userService.query(lookup).pipe(takeUntil(this._destroyed), map(x => x.items));
+		return this.userService.queryDmpAssociated(lookup).pipe(takeUntil(this._destroyed), map(x => x.items));
 	}
 
 	hasValue(): boolean {
diff --git a/dmp-frontend/src/app/ui/dmp/overview/dmp-overview.component.ts b/dmp-frontend/src/app/ui/dmp/overview/dmp-overview.component.ts
index 0d4a216e1..bb0b23b4b 100644
--- a/dmp-frontend/src/app/ui/dmp/overview/dmp-overview.component.ts
+++ b/dmp-frontend/src/app/ui/dmp/overview/dmp-overview.component.ts
@@ -37,6 +37,7 @@ import { TranslateService } from '@ngx-translate/core';
 import * as FileSaver from 'file-saver';
 import { takeUntil } from 'rxjs/operators';
 import { nameof } from 'ts-simple-nameof';
+import { DmpInvitationDialogComponent } from '../invitation/dialog/dmp-invitation-dialog.component';
 
 @Component({
 	selector: 'app-dmp-overview',
@@ -558,17 +559,16 @@ export class DmpOverviewComponent extends BaseComponent implements OnInit {
 	}
 
 	openShareDialog(rowId: any, rowName: any) {
-		//TODO: add this
-		// const dialogRef = this.dialog.open(DmpInvitationDialogComponent, {
-		// 	// height: '250px',
-		// 	// width: '700px',
-		// 	autoFocus: false,
-		// 	restoreFocus: false,
-		// 	data: {
-		// 		dmpId: rowId,
-		// 		dmpName: rowName
-		// 	}
-		// });
+		const dialogRef = this.dialog.open(DmpInvitationDialogComponent, {
+			// height: '250px',
+			// width: '700px',
+			autoFocus: false,
+			restoreFocus: false,
+			data: {
+				dmpId: rowId,
+				dmpName: rowName
+			}
+		});
 	}
 
 	selectDoi(entityDoi: EntityDoi) {