As per this thread, related issue.
Do you kwon how to register automatically the server name?
Article - "Is there a way to register Windchill server automatically when a user launches Creo Parametric the first time?": https://www.ptc.com/en/support/article/CS103228
This is how we do it. In your startup script we have:
If Not Exist "%PTC_WF_ROOT%\.ssappd\ServerMgr\.srv_mgr_db3.fldx" robocopy "%SERVER_DIR%\creo7\configs" "%PTC_WF_ROOT%\.ssappd\ServerMgr" /r:0 /NDL /NJH /NJS /nc /ns /if .srv_mgr_db3.fldx
If the user hasn't logged into Windchill then it copies down a .srv_mgr_db3.fldx which has a default workspace that everyone has access to and is set to "no server". Doing this makes sure that everyone is using the same Windchill server alias.