Zimbra Collaboration Suit (ZCS)
If you want to change Admin Console URL link showed in the webmail of administrator.
For example if it shows :
https://mail.example.com:7071
Now I want to change this admin URL to https://example.com:7071
[zimbra@amitmaheshwari.in ] $ zmprov md example.com zimbraWebClientAdminReference https://example.com:7071/