This answer will help you. You need to make sure that MATLAB machine can ping to license server and two ports of FlexNet and MLM are not blocked by firewall.
As of R2020a, the silent installer does not have an option to install the License Manager silently. In order to install the License Manager on a machine that requires a silent installation, you may manually install the License Manager with the License Manager binaries.
For information on manually installing the License Manager, please refer to the following article:
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