diff --git a/src/controller/request/user-request.ts b/src/controller/request/user-request.ts
index 2070ebbf..0f95c23e 100644
--- a/src/controller/request/user-request.ts
+++ b/src/controller/request/user-request.ts
@@ -60,11 +60,13 @@ export interface CreateUserRequest extends BaseUserRequest {
  * @property {boolean} deleted
  * @property {boolean} active
  * @property {boolean} extensiveDataProcessing
+ * @property {string} type
  */
 export interface UpdateUserRequest extends Partial<BaseUserRequest> {
   active?: boolean;
   deleted?: boolean;
   extensiveDataProcessing?: boolean
+  type?: UserType
 }
 
 
diff --git a/src/controller/user-controller.ts b/src/controller/user-controller.ts
index b62647c8..b5d91751 100644
--- a/src/controller/user-controller.ts
+++ b/src/controller/user-controller.ts
@@ -335,6 +335,22 @@ export default class UserController extends BaseController {
           body: { modelName: 'WaiveFinesRequest', allowBlankTarget: true },
         },
       },
+      '/:id(\\d+)/tolocaluser':{
+        POST: {
+          policy: async (req) => this.roleManager.can(
+            req.token.roles, 'update', UserController.getRelation(req), 'Authenticator', ['pin'],
+          ),
+          handler: this.changeToLocalUser.bind(this),
+        },
+      },
+      '/:id(\\d+)/toLocalUser':{
+        POST: {
+          policy: async (req) => this.roleManager.can(
+            req.token.roles, 'update', UserController.getRelation(req), 'Authenticator', ['*'],
+          ),
+          handler: this.changeToLocalUser.bind(this),
+        },
+      },
     };
   }
 
@@ -1650,4 +1666,36 @@ export default class UserController extends BaseController {
       this.logger.error(e);
     }
   }
+
+  /**
+   * POST /users/{id}/tolocalUser
+   * @summary Change user to a local user
+   * @tags users - Operations of user controller
+   * @param {integer} id.path.required - The id of the user
+   * @operationId toLocalUser
+   * @security JWT
+   * @return {UserResponse} 200 - Return changed user
+   * @return {string} 404 - User not found error.
+   */
+  public async changeToLocalUser(req: RequestWithToken, res:Response): Promise<void> {
+    const { id: rawId } = req.params;
+    this.logger.trace('Change user to local user', rawId, 'by', req.token.user);
+
+    try {
+      const id = parseInt(rawId, 10);
+
+      const user = await User.findOne({ where: { id:id } });
+      if (user == null) {
+        res.status(404).json('Unknown user ID.');
+        return;
+      }
+
+      const newUserResponse = await UserService.changeToLocalUsers(id);
+      res.status(200).json(newUserResponse);
+    } catch (e) {
+      res.status(500).send();
+      this.logger.error(e);
+    }
+
+  }
 }
diff --git a/src/mailer/messages/user-to-local-user.ts b/src/mailer/messages/user-to-local-user.ts
new file mode 100644
index 00000000..e8ca73f4
--- /dev/null
+++ b/src/mailer/messages/user-to-local-user.ts
@@ -0,0 +1,86 @@
+/**
+ *  SudoSOS back-end API service.
+ *  Copyright (C) 2024  Study association GEWIS
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published
+ *  by the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  @license
+ */
+
+/**
+ * This is the module page of the welcome-with-reset.
+ *
+ * @module internal/mailer
+ */
+
+import MailMessage, { Language, MailLanguageMap } from '../mail-message';
+import MailContentBuilder from './mail-content-builder';
+import { ResetTokenInfo } from '../../service/authentication-service';
+
+interface UserToLocalUserOptions {
+  email: string,
+  resetTokenInfo: ResetTokenInfo,
+  url?: string;
+}
+
+const userToLocalUserDutch = new MailContentBuilder<UserToLocalUserOptions>({
+  getHTML: (context) => `
+<p>Je account is veranderd zodat je zonder GEWIS account kan inloggen.</p>
+
+<p>Voordat je SudoSOS weer kunt gebruiken, dien je een wachtwoord te kiezen door te gaan naar ${context.url + '/passwordreset?token=' + context.resetTokenInfo.password + '&email=' + context.email}</p>
+
+<p>Tot op de borrel!</p>`,
+  getSubject: 'Welkom bij SudoSOS!',
+  getTitle: 'Welkom!',
+  getText: (context) => `
+Je account is omgezet zodat je zonder GEWIS account kan inloggen.
+
+Voordat je SudoSOS weer kunt gebruiken, dien je een wachtwoord te kiezen door te gaan naar ${context.url + '/passwordreset?token=' + context.resetTokenInfo.password + '&email=' + context.email}
+
+Tot op de borrel!`,
+});
+
+const userToLocalUserEnglish = new MailContentBuilder<UserToLocalUserOptions>({
+  getHTML: (context) => `
+<p>Your account has changed such that you can login without having a GEWIS account.</p>
+
+<p>Before you can actually use SudoSOS again, you have to set a password by going to ${context.url + '/passwordreset?token=' + context.resetTokenInfo.password + '&email=' + context.email}</p>
+
+<p>See you on the borrel!</p>`,
+  getSubject: 'Welcome to SudoSOS!',
+  getTitle: 'Welcome!',
+  getText: (context) => `
+Your account has changed such that you can login without having a GEWIS account.
+
+Before you can actually use SudoSOS again, you have to set a password by going to ${context.url + '/passwordreset?token=' + context.resetTokenInfo.password + '&email=' + context.email}
+
+See you on the borrel!`,
+});
+
+const mailContents: MailLanguageMap<UserToLocalUserOptions> = {
+  [Language.DUTCH]: userToLocalUserDutch,
+  [Language.ENGLISH]: userToLocalUserEnglish,
+};
+
+export default class UserToLocalUser extends MailMessage<UserToLocalUserOptions> {
+  public constructor(options: UserToLocalUserOptions) {
+    const opt: UserToLocalUserOptions = {
+      ...options,
+    };
+    if (!options.url) {
+      opt.url = process.env.url;
+    }
+    super(opt, mailContents);
+  }
+}
diff --git a/src/service/authentication-service.ts b/src/service/authentication-service.ts
index 8d0d5338..a3956640 100644
--- a/src/service/authentication-service.ts
+++ b/src/service/authentication-service.ts
@@ -37,9 +37,7 @@ import TokenHandler from '../authentication/token-handler';
 import RoleManager from '../rbac/role-manager';
 import LDAPAuthenticator from '../entity/authenticator/ldap-authenticator';
 import MemberAuthenticator from '../entity/authenticator/member-authenticator';
-import {
-  bindUser, getLDAPConnection, getLDAPSettings, LDAPResult, LDAPUser, userFromLDAP,
-} from '../helpers/ad';
+import { bindUser, getLDAPConnection, getLDAPSettings, LDAPResult, LDAPUser, userFromLDAP } from '../helpers/ad';
 import { parseUserToResponse } from '../helpers/revision-to-response';
 import HashBasedAuthenticationMethod from '../entity/authenticator/hash-based-authentication-method';
 import ResetToken from '../entity/authenticator/reset-token';
@@ -49,6 +47,7 @@ import NfcAuthenticator from '../entity/authenticator/nfc-authenticator';
 import RBACService from './rbac-service';
 import Role from '../entity/rbac/role';
 import WithManager from '../database/with-manager';
+import UserService from './user-service';
 
 export interface AuthenticationContext {
   tokenHandler: TokenHandler,
@@ -308,7 +307,13 @@ export default class AuthenticationService extends WithManager {
     const authenticator = await this.manager.findOne(LDAPAuthenticator, { where: { UUID: ADUser.objectGUID }, relations: ['user'] });
 
     // If there is no user associated with the GUID we create the user and bind it.
-    if (authenticator) return authenticator.user;
+    if (authenticator) {
+      if (authenticator.user.type == UserType.LOCAL_USER) {
+        await UserService.updateUser(authenticator.user.id, { canGoIntoDebt: true, type: UserType.MEMBER });
+      }
+
+      return authenticator.user;
+    }
     return onNewUser(ADUser);
   }
 
diff --git a/src/service/user-service.ts b/src/service/user-service.ts
index 602b4482..3abbce9a 100644
--- a/src/service/user-service.ts
+++ b/src/service/user-service.ts
@@ -47,6 +47,7 @@ import WelcomeWithReset from '../mailer/messages/welcome-with-reset';
 import { Brackets, In } from 'typeorm';
 import BalanceService from './balance-service';
 import AssignedRole from '../entity/rbac/assigned-role';
+import UserToLocalUser from '../mailer/messages/user-to-local-user';
 
 /**
  * Parameters used to filter on Get Users functions.
@@ -291,6 +292,22 @@ export default class UserService {
     return true;
   }
 
+  /**
+   * Change user to local User
+   * @param userId - ID of the user to change to local user
+   */
+  public static async changeToLocalUsers(userId: number): Promise<UserResponse> {
+    const user = await User.findOne({ where: { id: userId } });
+    if (!user) return undefined;
+
+    const resetTokenInfo = await new AuthenticationService().createResetToken(user);
+    Mailer.getInstance().send(user, new UserToLocalUser({ email: user.email, resetTokenInfo })).then().catch((e) => {
+      throw e;
+    });
+
+    return UserService.updateUser(userId, { canGoIntoDebt: false, type: UserType.LOCAL_USER });
+  }
+
   /**
    * Combined query to return a users transfers and transactions from the database
    * @param user - The user of which to get.
diff --git a/test/unit/controller/user-controller.ts b/test/unit/controller/user-controller.ts
index cc8fe366..89b2e07c 100644
--- a/test/unit/controller/user-controller.ts
+++ b/test/unit/controller/user-controller.ts
@@ -2592,4 +2592,42 @@ describe('UserController', (): void => {
       });
     });
   });
+  describe('POST /users/{id}/toLocalUser', ()=> {
+    it('should return 200 and a correct user response', async () => {
+      const id = 1;
+      const user = await User.findOne({ where: { id: id } });
+      expect(user).to.not.be.null;
+
+      const res = await request(ctx.app)
+        .post(`/users/${id}/toLocalUser`)
+        .set('Authorization', `Bearer ${ctx.adminToken}`);
+
+      expect(res.status).to.be.equal(200);
+      expect((res.body as UserResponse).type).to.be.equal(UserType.LOCAL_USER);
+      expect((res.body as UserResponse).canGoIntoDebt).to.be.false;
+    });
+    it('should return 403 if not admin', async () => {
+      const id = 1;
+      const user = await User.findOne({ where: { id: id } });
+      expect(user).to.not.be.null;
+
+      const res = await request(ctx.app)
+        .post(`/users/${id}/toLocalUser`)
+        .set('Authorization', `Bearer ${ctx.userToken}`);
+
+      expect(res.status).to.be.equal(403);
+    });
+    it('should return 404 if user does not exist', async () => {
+      const count = await User.count();
+      const id = count + 1;
+      const user = await User.findOne({ where: { id } });
+      expect(user).to.be.null;
+
+      const res = await request(ctx.app)
+        .post(`/users/${id}/toLocalUser`)
+        .set('Authorization', `Bearer ${ctx.adminToken}`);
+
+      expect(res.status).to.be.equal(404);
+    });
+  });
 });
diff --git a/test/unit/service/authentication-service.ts b/test/unit/service/authentication-service.ts
index 3da0c2c4..ec3000dd 100644
--- a/test/unit/service/authentication-service.ts
+++ b/test/unit/service/authentication-service.ts
@@ -38,6 +38,7 @@ import HashBasedAuthenticationMethod from '../../../src/entity/authenticator/has
 import LocalAuthenticator from '../../../src/entity/authenticator/local-authenticator';
 import AuthenticationResetTokenRequest from '../../../src/controller/request/authentication-reset-token-request';
 import { truncateAllTables } from '../../setup';
+import UserService from '../../../src/service/user-service';
 
 export default function userIsAsExpected(user: User | UserResponse, ADResponse: any) {
   expect(user.firstName).to.equal(ADResponse.givenName);
@@ -187,6 +188,45 @@ describe('AuthenticationService', (): void => {
 
       expect(count).to.be.equal(await User.count());
     });
+    it('should login and set user to member again if member can be found in AD', async () => {
+      const otherValidADUser = {
+        ...ctx.validADUser, givenName: 'Test', objectGUID: Buffer.from('22', 'hex'), sAMAccountName: 'm0041',
+      };
+
+      const clientBindStub = sinon.stub(Client.prototype, 'bind').resolves(null);
+      const clientSearchStub = sinon.stub(Client.prototype, 'search').resolves({
+        searchReferences: [],
+        searchEntries: [otherValidADUser],
+      });
+      stubs.push(clientBindStub);
+      stubs.push(clientSearchStub);
+
+      let user: User;
+      await ctx.connection.transaction(async (manager) => {
+        const service = new AuthenticationService(manager);
+        user = await service.LDAPAuthentication('m0041', 'This Is Correct', service.createUserAndBind.bind(service));
+      });
+
+      userIsAsExpected(user, otherValidADUser);
+
+      await UserService.changeToLocalUsers(user.id);
+      expect((await User.findOne({ where: { id: user.id } })).type).to.be.equal(UserType.LOCAL_USER);
+
+      let DBUser = await User.findOne(
+        { where: { firstName: otherValidADUser.givenName, lastName: otherValidADUser.sn } },
+      );
+      expect(DBUser).to.not.be.undefined;
+
+      const count = await User.count();
+
+      await ctx.connection.transaction(async (manager) => {
+        const service = new AuthenticationService(manager);
+        user = await service.LDAPAuthentication('m0041', 'This Is Correct', service.createUserAndBind.bind(service));
+      });
+
+      expect(count).to.be.equal(await User.count());
+      expect((await User.findOne({ where: { id: user.id } })).type).to.be.equal(UserType.MEMBER);
+    });
     it('should return undefined if wrong password', async () => {
       const clientBindStub = sinon.stub(Client.prototype, 'bind').resolves(null);
       const clientSearchStub = sinon.stub(Client.prototype, 'search').resolves({