I have found the problem with the curl.
If i start the url https://msappsrv03.msmode.lan:8080/bridge/BridgeManager in an explorer on the testserver and use the credentials admin:0DPiKuNIrrVmD8IUCuw1hQxNqZc= from the example provided in the FAQ, i get a logon screen. i can logon using admin:admin also like in the example. When i want to do the same in production the url https://msprodsrv01.msmode.lan:8080/bridge/BridgeManager returns an error 401.
I believe the admin:0DPiKuNIrrVmD8IUCuw1hQxNqZc= is not sufficient for production.
Could someone please resolve this ?