diff --git a/alfa-client/apps/alfa-e2e/src/e2e/main-tests/postfach-mail/postfach-mail.cy.ts b/alfa-client/apps/alfa-e2e/src/e2e/main-tests/postfach-mail/postfach-mail.cy.ts
index 8f32eb567802ce78e439567c3cdc4bcfb5c0bfb8..292ad9ca566f8a29f7be1fcbf104757c712eb5cb 100644
--- a/alfa-client/apps/alfa-e2e/src/e2e/main-tests/postfach-mail/postfach-mail.cy.ts
+++ b/alfa-client/apps/alfa-e2e/src/e2e/main-tests/postfach-mail/postfach-mail.cy.ts
@@ -116,7 +116,7 @@ describe('PostfachMail', () => {
     return {
       ...buildVorgang(objectIds[2], 'VorgangWithoutPostfachId'),
       eingangs: [...vorgang.eingangs],
-      header: { serviceKonto: null },
+      header: { serviceKonto: null, collaborationLevel: 0 },
     };
   }
 
diff --git a/alfa-client/apps/alfa-e2e/src/e2e/main-tests/postfach-mail/postfach-nachricht-reply-button.cy.ts b/alfa-client/apps/alfa-e2e/src/e2e/main-tests/postfach-mail/postfach-nachricht-reply-button.cy.ts
index ca29375a29c0d5ce113b82357dca681679efdad5..eca73b26f756e3a3610b82f62299ddbde612e5a3 100644
--- a/alfa-client/apps/alfa-e2e/src/e2e/main-tests/postfach-mail/postfach-nachricht-reply-button.cy.ts
+++ b/alfa-client/apps/alfa-e2e/src/e2e/main-tests/postfach-mail/postfach-nachricht-reply-button.cy.ts
@@ -42,6 +42,7 @@ describe('Postfach Nachricht reply button', () => {
     },
     name: 'BayernID Vorgang',
     header: {
+      collaborationLevel: 0,
       serviceKonto: {
         type: 'BayernId',
         postfachAddress: [
diff --git a/alfa-client/apps/alfa-e2e/src/fixtures/vorgang/vorgang.json b/alfa-client/apps/alfa-e2e/src/fixtures/vorgang/vorgang.json
index 7db3791c3468b1f263a22f255637f3153de69eee..fd4d23ab75d2d554467e4631abb1848acefd52f7 100644
--- a/alfa-client/apps/alfa-e2e/src/fixtures/vorgang/vorgang.json
+++ b/alfa-client/apps/alfa-e2e/src/fixtures/vorgang/vorgang.json
@@ -12,6 +12,7 @@
   "status": "NEU",
   "inCreation": false,
   "header": {
+    "collaborationLevel": 0,
     "serviceKonto": {
       "type": "OSI",
       "postfachAddresses": [
diff --git a/alfa-client/apps/alfa-e2e/src/model/vorgang.ts b/alfa-client/apps/alfa-e2e/src/model/vorgang.ts
index aca577c4cea54f5d30ca05ca61956be6cb82099b..7fdbcfd62b93935aef7f35cb4a4f7fc1858c4422 100644
--- a/alfa-client/apps/alfa-e2e/src/model/vorgang.ts
+++ b/alfa-client/apps/alfa-e2e/src/model/vorgang.ts
@@ -67,6 +67,7 @@ export class VorgangE2E {
 
 export class VorgangHeaderE2E {
   serviceKonto: ServiceKontoE2E;
+  collaborationLevel: number;
 }
 
 export class ServiceKontoE2E {