The proxy settings contain a password that will be transmitted in the clear to the AD RMS server if you are not using a secure ...

The proxy settings contain a password that will be transmitted in the clear to the AD RMS server if you are not using a secure channel between this administration snap-in and the server. Examples of secure channels include an SSL connection, or use of IPSec for encryption. Please see the AD RMS Security Guide for more information on how to securely deploy your AD RMS server.  If you are not set up for an encrypted channel, we recommend this action to be performed locally on the server.  Do you wish to proceed?