diff --git a/sfera-mock/src/main/java/ch/sbb/sferamock/messages/services/OperationModeSelector.java b/sfera-mock/src/main/java/ch/sbb/sferamock/messages/services/OperationModeSelector.java
index f37220a6..f686444c 100644
--- a/sfera-mock/src/main/java/ch/sbb/sferamock/messages/services/OperationModeSelector.java
+++ b/sfera-mock/src/main/java/ch/sbb/sferamock/messages/services/OperationModeSelector.java
@@ -30,7 +30,7 @@ public Optional<OperationMode> selectOperationMode(List<OperationMode> incomingO
             return getObserver(statusReportEnabled);
         }
         if (validModes.contains(driver)) {
-            return Optional.empty();
+            return Optional.of(driver);
         }
         if (validModes.contains(observer)) {
             return getObserver(!statusReportEnabled);
diff --git a/webapp/src/app/auth.service.ts b/webapp/src/app/auth.service.ts
index 88e73707..f3e1050c 100644
--- a/webapp/src/app/auth.service.ts
+++ b/webapp/src/app/auth.service.ts
@@ -20,6 +20,9 @@ export class AuthService {
 
   }
 
+  /**
+   * deprecated
+   */
   exchange(ru: string = '', train: string = '', role: string = ''): Observable<string> {
     return this.httpClient.get(`${environment.backendUrl}/customClaim/requestToken`, {
       params: new HttpParams().set('ru', ru).set('train', train).set('role', role),
diff --git a/webapp/src/app/mqtt-playground/mqtt-playground.component.ts b/webapp/src/app/mqtt-playground/mqtt-playground.component.ts
index 55571548..1ac9c42b 100644
--- a/webapp/src/app/mqtt-playground/mqtt-playground.component.ts
+++ b/webapp/src/app/mqtt-playground/mqtt-playground.component.ts
@@ -5,7 +5,6 @@ import { MqService } from "../mq.service";
 import { SbbIcon } from "@sbb-esta/angular/icon";
 import { AsyncPipe } from "@angular/common";
 import { MqttConnectionState } from "ngx-mqtt";
-import { AuthService } from "../auth.service";
 import { firstValueFrom, map } from "rxjs";
 import { OidcSecurityService } from "angular-auth-oidc-client";
 
@@ -23,8 +22,8 @@ import { OidcSecurityService } from "angular-auth-oidc-client";
 })
 export class MqttPlaygroundComponent implements OnDestroy {
 
-  constructor(public mqService: MqService, private authService: AuthService, private oidcSecurityService: OidcSecurityService) {
-    this.authService.exchange().subscribe(async token => {
+  constructor(public mqService: MqService, private oidcSecurityService: OidcSecurityService) {
+    this.oidcSecurityService.getAccessToken().subscribe(async token => {
       const userName = await firstValueFrom(this.oidcSecurityService.getUserData().pipe(map((data) => data?.preferred_username)));
       this.mqService.connect(userName, token)
     });
diff --git a/webapp/src/app/sfera-observer/sfera-observer.component.ts b/webapp/src/app/sfera-observer/sfera-observer.component.ts
index b491e1d8..61db2049 100644
--- a/webapp/src/app/sfera-observer/sfera-observer.component.ts
+++ b/webapp/src/app/sfera-observer/sfera-observer.component.ts
@@ -4,8 +4,6 @@ import { SbbFormFieldModule } from "@sbb-esta/angular/form-field";
 import { SbbInputModule } from "@sbb-esta/angular/input";
 import { MqService } from "../mq.service";
 import { SbbButtonModule } from "@sbb-esta/angular/button";
-import { SimpleXmlComponent } from "../simple-xml/simple-xml.component";
-import { AuthService } from "../auth.service";
 import { firstValueFrom, map, Subscription } from "rxjs";
 import { CommonModule } from "@angular/common";
 import { MqttConnectionState } from "ngx-mqtt";
@@ -27,7 +25,6 @@ import { SbbAccordionModule } from "@sbb-esta/angular/accordion";
     SbbInputModule,
     SbbButtonModule,
     SbbCheckboxModule,
-    SimpleXmlComponent,
     MessageTableComponent,
     SbbAccordionModule,
   ],
@@ -55,7 +52,6 @@ export class SferaObserverComponent implements OnDestroy {
   protected readonly MqttConnectionState = MqttConnectionState;
 
   constructor(private oidcSecurityService: OidcSecurityService,
-              private authService: AuthService,
               protected mqService: MqService) {
   }
 
@@ -65,9 +61,9 @@ export class SferaObserverComponent implements OnDestroy {
     this.g2bTopic = customTopicPrefix + '90940/2/G2B/' + this.companyControl.value + '/' + trainOperation + '/' + this.clientIdControl.value;
     this.b2gTopic = customTopicPrefix + '90940/2/B2G/' + this.companyControl.value + '/' + trainOperation + '/' + this.clientIdControl.value;
     this.eventTopic = customTopicPrefix + '90940/2/event/' + this.companyControl.value + '/' + trainOperation;
-    const exchangeToken = await firstValueFrom(this.authService.exchange(this.companyControl.value, trainOperation, 'read-only'));
+    const token = await firstValueFrom(this.oidcSecurityService.getAccessToken());
     const username = await firstValueFrom(this.oidcSecurityService.getUserData().pipe(map((data) => data?.preferred_username)));
-    await this.mqService.connect(username, exchangeToken);
+    await this.mqService.connect(username, token);
 
     this.g2bSubscription = this.mqService.observe(this.g2bTopic)
       .subscribe(value => {