If I understand you correctly, the concern is not related to interactive use, but to running computations.
Interactive use would give end users warnings about the connection to the server is lost in 2 minute increments and you have at least 20 minutes to save results etc.
Running computations shall not be interrupted, but reading about R14SP3, I cannot say for sure. Most organizations I know of inform end users in a way like "We will shut down the license server next week Friday night, please make sure, etc.".