Teamviewer blackscreen if windows rdp off

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Hello,

I have a small Windows 10 home server with the newest Teamviewer.
I dont have a physical graficcard, i use only the graficcard from the i5-8600k.
When i try to join my Server, i have a black screen, but when i join too with windows rdp then i have a screen on teamviewer, but if i close then rdp i have again a black screen with teamviewer..

Is there a way to fix this without a active rdp connection?
Thx

Edit: i found this:

https://community.teamviewer.com/t5/TeamViewer-General/Session-Goes-black-screen-once-Remote-Desktop-session-is-closed/m-p/38658/highlight/true#M19458

Yes, i think i have a sever id; x xxx xxx xxx, how can i change from server id to the user id; xxx xxx xxx ? (Reinstalled, deleted all files, still server id)