1. A method comprising: modifying, by a server computing system, sequence data of an application to be invoked in a virtual environment, the modifying creating modified sequence data to cause a client computing system to invoke a proxy agent in the virtual environment prior to invoking the application in the virtual environment; generating a virtualized application package for the application using the modified sequence data; and providing the virtualized application package to cause the client computing system to invoke the proxy agent in the virtual environment, wherein the proxy agent changes a configuration of the application to cause the application to load a data-loss protection plug-in in the virtual environment to prevent loss of protected data.