In response to your feedback, UITS is postponing the shutdown date for Cyrus (IU Webmail) until fall 2015.
UITS will provide an optional migration tool to help streamline the process of moving email messages from Cyrus to Exchange. We are currently purchasing licenses and creating documentation. We tentatively expect those to be available by February 2, when optional automatic migration of mail accounts from Cyrus begins.
Manual migrations currently remain the best option for accounts with a modest amount of data and a simple folder structure. The manual process also allows you to control the timing of your migration.