The help articles for Static and Dynamic Groups and Working with Groups list the ability to 'Restrict To' an existing group. This function is available on other records as well. However when I try to use the 'Restrict to' function, only Static Groups are available to choose; no dynamic groups show up. None of the articles mention this limitation, and it certainly limits the power of using groups if the groups that can be used to manage access or use of certain resources must be maintained manually and not via defined criteria of Dynamic groups. Am I missing something?