When a group receives an invitation, this attribute indicates whether the invitation is marked automatically as accepted. When enabled, the attribute causes the scheduled event to be marked as busy on the group calendar without any member taking any action.
For a Calendar resource, this attribute allows the resource to accept invitations automatically.
The icsAutoaccept attribute can have a value of 1, which allows automatic acceptance of invitations, or 0, which prohibits automatic acceptance.
For a group calendar, the default value is 0 (prohibit automatic acceptance of events). For a Calendar resource, the default value is 1 (allow automatic acceptance of events).