Accepted.Will update feature availability and release plan later on.

I've requested this from the ID Console team a thousand times already, I also find it very annoying. It's supposed to be part of the planned features that should include customization in the UI.

What I use to mitigate this is a Firefox extension called "Autofill forms". It lets you create custom fields with specific values. That way you can select between different trees. 

For now, one can only edit the html page to supply a default value:

identityconsole-container:/home/nds # diff -u /var/opt/novell/identityconsole/login.html.bak /var/opt/novell/identityconsole/login.html
--- /var/opt/novell/identityconsole/login.html.bak      2022-11-08 17:25:51.497267444 +0000
+++ /var/opt/novell/identityconsole/login.html  2022-11-08 17:25:59.829334697 +0000
@@ -69,7 +69,7 @@
                                     <div class="input-box tooltip">
                                         <label for="Server">Server</label>
                                         <input type="text" name="Server" id="Server"
-                                            placeholder="Server IP / DNS" value="">
+                                            placeholder="Server IP / DNS" value="engine.example.com">
                                         <span class="tooltiptext">example: 192.168.1.1 (or) edirectory.netiq.com
                                     </div>