Can I add Exchange distribution lists to AgendaX groups instead of individual mailboxes?
Yes. AgendaX groups can contain individual mailboxes and / or Exchange Distribution Lists. Exchange Distribution Lists are resolved to their members each time the AgendaX Update Service scans calendars, so new members of an Exchange Distribution List are automatically added to AgendaX groups. Likewise, members that are deleted from an Exchange distribution list also get deleted from AgendaX groups. Therefore, you only need to update group membership in Exchange distribution lists, and AgendaX automatically updates its groups.