This post needs to be updated for 6.0.x GnR
The directory for skins has changed from the previous posts above.
Skins are now located in:
Code:
/opt/zimbra/jetty/webapps/zimbra/skins
There may be several jetty entires but just use 'jetty'.
I tried this and was able to install three new themes. In the ZCS Admin Console, these new themes show up in server COS and domain and in each user account but when I log onto any user from the ZCS client, they do not show up in the list.