On any winbox plan when you click on
Webshell4 button there is a message that comes up that says
User not known to the underlying authentication module in the browser window
Incorrect Webshell is tried to be used.
http://winbox.domainname.com/webshell4 is opened, but it is resolving to the CP address 10.10.10.12 but not to the one of the Winbox, 10.10.10.14.
To resolve the issue please go to
E.Manager->Servers->Enterprise and click
Re-generate all system custom DNS records.