SMA continues to support the offline (manual) licensing model. This is used when appliances are upgraded with an existing license and for customers who deploy their appliances without an available connection to the License Manager back end.
To install offline method
In AMC, navigate to System Configuration > General Settings > Licensing and click Edit.
Append ?advanced=1 in the URL.
Under Advance section, Manual Licensing section is displayed.
The Manual Licensing section is displayed.
Click Import License.
Browse the license file and click Upload.
The license is successfully uploaded.