Hello,
i havent found something that describes my problem so im just posting it here and hope someone may could help or explain to me 
I have ServerA in my local Network. Logged in with my account and everything works fine.
Now i set up another Server (ServerB) on a different Network, that is public accessible.
When I open mypublicip:32400 (ServerB) and login with my account, it shows my Plex on ServerA (local Network).
My Plan was to set up a second Plex Server and stream music to my mobile phone but it didn’t even gave me the option to configure it as another one…
Is it even possible to do as i plan?