Boris Yanushpolsky created this nice utility for Enabling proxying for agents.
When deploying the AD or Exchange management packs you need to enable proxying on agents in order for discovery to work properly. This could be a time consuming process since there is no way to multi select all the required agents and enable proxyings for all of them at once. To help with this issue, I wrote a UI based utility that allows you to select a computer group, browse the members, and multiselect the right computers and enable/disable proxying.
The link to the zip file is at the bottom of this post.