In this article you will learn how to customize the Zimbra favicon, for example with your company logo making it more recognizable for your users.
Here is a screenshot of the default Zimbra favicon:
To customize the favicon, replace the existing favicon.ico with custom one in the folder:
/opt/zimbra/jetty/webapps/zimbra/img/logo
Then for Modern UI replace the existing favicon.ico with custom one in the folder:
/opt/zimbra/jetty/webapps/zimbra/modern/clients/default/assets
Then clear the cache of the server and restart the mailboxd service as the user zimbra. (You also need to flush your browser cache.)
zmprov fc all zmmailboxdctl restart
Finally see the result:
From: https://wiki.zimbra.com/wiki/How_to_change_Favicon_on_the_Webclient
Did you know that these steps are not persistent? They need to be repeated after every mailboxd related Zimbra security/patch update, like 9.0.0 P35, P36 etc.
Yes you will have to re-apply the changes after installing Zimbra updates/patches. However a regular mailbox restart will not undo the steps from the blog post.