I had posted this as a question but it looks like it's not possible so here is a feature request.
When in Zimbra Desktop, you have the navigation pain on the left.
It contains your various folders and accounts.
I think it would be a very useful feature to be able to customize the account name.
By account name I'm referring to the name in the gray box, which also contains the green icon symbolizing the account is online.
In my case I have the same username in two domains. And I have to remember which one is "(2)"