To start check the main settings
Manage Organization -> IBM Smartcloud Notes -> Account Settings -> Email &Calendar Options
After some minutes every users under his settings will have the Setup Offline mail button
a new password for offline enablement will be requested
after the sync users will be able to switch between offline and offline and will be able to login to verse using the URL https://mail.notes.ce.collabserv.com/verse starting offline
This solution could be a nice buffer to work without a connectivity, if you need to have more days available offline IBM Notes still be the righ choice , waiting IBM Mail for Outlook .