after upgrade to 8.0.6 (NE & OSS), that notice gone. I can grep it on ZmMsg.properties though but not sure how to get it there again on login page.

Code:
$ grep "Go offline" *
ZmMsg.properties:clientLoginNotice = Go offline with Zimbra Desktop. <a target="_new" href="https://www.zimbra.com/products/zimbra-desktop/index.html">Learn more.</a> <br /><a target="_new" href="http://www.zimbra.com">Zimbra</a> :: the leader in open source messaging and collaboration :: \
ZmMsg.properties:switchToOfflineClientEx = Go offline with Zimbra Desktop. <a href='http://www.zimbra.com/products/desktop.html' target='_blank'>Learn more</a>
ZmMsg_en_AU.properties:switchToOfflineClientEx = Go offline with Zimbra Desktop. <a href='http://www.zimbra.com/products/desktop.html' target='_blank'>Learn more</a>
ZmMsg_en_GB.properties:switchToOfflineClientEx = Go offline with Zimbra Desktop. <a href='http://www.zimbra.com/products/desktop.html' target='_blank'>Learn more</a>