diff --git a/src/utils/urls/urlHelper.test.ts b/src/utils/urls/urlHelper.test.ts
index e5a450e2c6..7e55a6800e 100644
--- a/src/utils/urls/urlHelper.test.ts
+++ b/src/utils/urls/urlHelper.test.ts
@@ -138,14 +138,14 @@ describe('Shared urlHelper.ts', () => {
   });
 
   test('logoutUrlAltinn() should return correct url for each env.', () => {
-    const originTT = 'https://ttd.apps.tt02.altinn.no/tdd/tjeneste-20190826-1130';
-    const originAT = 'https://ttd.apps.at21.altinn.cloud/tdd/tjeneste-20190826-1130';
-    const originYT = 'https://ttd.apps.yt01.altinn.cloud/tdd/tjeneste-20190826-1130';
-    const originProd = 'https://ttd.apps.altinn.no/tdd/tjeneste-20190826-1130';
-    expect(logoutUrlAltinn(originTT)).toContain('tt02.altinn.no/ui/authentication/LogOut');
-    expect(logoutUrlAltinn(originAT)).toContain('at21.altinn.cloud/ui/authentication/LogOut');
-    expect(logoutUrlAltinn(originYT)).toContain('yt01.altinn.cloud/ui/authentication/LogOut');
-    expect(logoutUrlAltinn(originProd)).toContain('altinn.no/ui/authentication/LogOut');
+    expect(logoutUrlAltinn(originTT)).toBe('https://platform.tt02.altinn.no/authentication/api/v1/logout');
+    expect(logoutUrlAltinn(originAT)).toBe('https://platform.at21.altinn.cloud/authentication/api/v1/logout');
+    expect(logoutUrlAltinn(originYT)).toBe('https://platform.yt01.altinn.cloud/authentication/api/v1/logout');
+    expect(logoutUrlAltinn(originProd)).toBe('https://platform.altinn.no/authentication/api/v1/logout');
+    expect(logoutUrlAltinn(originLocalCloud)).toBe('/');
+    expect(logoutUrlAltinn(originLocalCloudWithPort)).toBe('/');
+    expect(logoutUrlAltinn(originLocal)).toBe('/');
+    expect(logoutUrlAltinn(originUnknown)).toBe('/');
   });
 
   test('makeUrlRelativeIfSameDomain()', () => {
diff --git a/src/utils/urls/urlHelper.ts b/src/utils/urls/urlHelper.ts
index e78ff6ef60..e478b6d97b 100644
--- a/src/utils/urls/urlHelper.ts
+++ b/src/utils/urls/urlHelper.ts
@@ -145,7 +145,10 @@ export function customEncodeURI(uri: string): string {
   return result;
 }
 
-export const logoutUrlAltinn = (url: string): string => `${returnBaseUrlToAltinn(url)}ui/authentication/LogOut`;
+export const logoutUrlAltinn = (url: string): string => {
+  const host = extractHostFromUrl(url);
+  return host ? `https://platform.${host}/authentication/api/v1/logout` : '/';
+};
 
 // Storage is always returning https:// links for attachments.
 // on localhost (without https) this is a problem, so we make links