The RTM release of Exchange Server 2019 doesn’t properly configure cipher suites whitelisted for HTTP/2 on some browsers. This script updates the cipher suite ordering to allow HTTP/2 negotiation on supported browsers. Restarting the server or services should not be required after executing the script. The script should be executed after Exchange Server 2019 RTM is installed on a server. New servers installed using Exchange Server 2019 Cumulative Update 1 or later do not require the use of this script.