Even if you update modules offline, the product must be activated at least once. This can be done using an offline license file (.lf) generated through your ESET Business Account.
For environments with multiple offline machines, the most efficient method is creating an update mirror on a single computer that does have internet access. eset smart security offline update
On a connected computer, open the ESET application , press F5 for Advanced Setup, and go to Update > Profiles > Update Mirror . Enable the Create update mirror and Enable HTTP Server options. Even if you update modules offline, the product