1. A method comprising: scheduling a meeting using one or more server computer systems; defining, using the one or more server computer systems, a set of custom policies comprising a failover policy and a failback policy instructing the one or more server computer systems to select a replacement meeting moderator in response to an absence of an original meeting moderator in the meeting, the failover policy specifying a custom hierarchy of one or more replacement meeting moderators, the failback policy specifying a custom policy for reestablishing control of the meeting with the original meeting moderator in response to the original meeting moderator rejoining the meeting; detecting during the meeting, by the one or more server computer systems, that the original meeting moderator is absent by one of the original meeting moderator leaving the meeting and the original meeting moderator failing to log on to the meeting; and designating based on the failover policy, by the one or more server computer systems, the replacement meeting moderator for the meeting in response to detecting that the original meeting moderator is absent in the meeting.