Note: How to authenticate remotely?

" What happens if test@server1.com and test@server2.com both login to server3.com (yacs servers)? If they use the same username, their shadow login names will be the same too, no (test)? "

Well, normally not. Test@server1.com will benefit from a short nick name, but test@server2.com will always have to use the lengthy version, including the server name.

However, I have not tested this yet, and, you know, something that has not been tested has a very high probability to not work as expected...

Thank you for your valuable comments, as usual...