You can access Garoon using your smartphone from outside the office.
If you want to use Garoon from smartphones, you can use the screens that are optimized for them (mobile view) or KUNAI.

To access Garoon when you work from home or when you are out, you must have any environment to remotely access Garoon such as remote services or VPN environments.
Confirm the settings and operations required for remote access to your system administrator.