Check out the latest video on Sophos Techvids that outlines how to migrate from Cyberoam to Sophos XG!
The latest maintenance releases for XG Firewall are SFOS v17.5 and v18:
Below KBAs and TechVids will help with the initial setup for SFOS v17.5 & v18
XG Firewall v17.5: User assistance for v17.5
XG Firewall v18: User assistance for v18
XG Firewall v17.5
XG Firewall V18