Please update SEMS and Encryption Desktop to have the Default Keyservers that you configure in SEMS download to client when updated on the SEMS, rather than requiring a download and redeployment of the client to all users.
Also, enable the "Default Keyservers" to be a default key search location by clients and in all mail policy rules, so you don't need to update this in a million different places for the addition or removal of 1 keyserver and to be able to find keys from the client.
This is very invasive to users as it requires a reboot and additional actions to take place on thier end and the server side. Additionally, keyservers may be added/removed at anytime, this should be a simple update to implement.