Changing Webmail service port from 443 to other

Hello guys, sorry if i may not be at the correct location to post it.

I have been strugling to make it to work, and i need some help to make it happens. 

I have Carbonio 24.12.4 installed and i am not able to change the webmail port from 443 to 8443 or any other. I tried changing by GUI and by CLI but it is not working at all. 

Can someone help me with that and guide me on how to solve this issue?

thank you