Remember that there is no site search and that search is undertaken via the OU header. On the AACS environment the Drupal core optional module Search will not be switched on and your site will not be able to use it.
If your site makes use of audio or video material this should either be embedded from YouTube (or a similar external service), or the OU's podcast directory. if you wish to use other solutions you must discuss with Online Services and AACS first.
