What do the different settings under Notification Server > Task Settings affect?
This is a brieft description of what the different settings do:
Task Agent Settings - Task Update instucts the client to check in for tasks every X minutes. Note that if the agent has a tickle connection to the server the agent will still check in for tasks every X ammount of time and will check in whenever the sever sends down a tickle. Think of this setting like a backup incase the tickle connection is not working. Site Server will set the priority on which site server a client should connect to incase the client is assigned to multiple site servers under site management.
Tokens - All of the different tokens that can be used in tasks that support tokens
Update Summary data - This setting updates task data class tables used for heirarchy replication.
Update Task Service Assignments - This will assign all unmanaged computers to a site server.