Hi,
Thank you for helping. The problem was, that i use 1 node for HP iLO which has 8 Network Interfaces, one of the Network interfaces has the same IP Address of the ESXi VMWare Host which is installed on this Server. So the IP-Adress is a duplicate and the new Node was deleted.
I changed the Server Property to: NetworkDiscovery.MergeDuplicateNodes = 0
Now I think it works!
Thank you so much for helping!
Bye
Woody