2530317 - Fiori: SSO not working after running a Web dynpro or transaction app

After opening a transaction or web dynpro app in a new tab and returning to the fiori launchpad tab, a pop up asking for credentials is returned although:

• SSO is configured correctly and was working before performing this action.
• The security session cookie SAP_SESSION_<SID>_<CLIENT> is still valid and sent by the browser.

Looking closer at the pop-up asking for credentials, it shows that these are required by the frontend system but for the backend client.

This can happen under the following circumstances:

• You are using the same web dispatcher to reach both the frontend (to run the FLP) and backend system (to run the transaction/web dynpro)
• The client in the frontend system is different from the client of the backend system.

SAP Fiori Launchpad

sap-usercontext, sap-client, transaction, "web dynpro", sso, "security session", credentials, pop-up, fiori launchpad, webgui, webdynpro, refresh Lanchpad , Fiori Launchpad Logon, Fiori Launchpad Log on, tab refresh launchpad log on, client , KBA , CA-FLP-ABA , SAP Fiori Launchpad ABAP Services , BC-CST-WDP , Web Dispatcher , Problem