You can administer the Presence Server to define the expiration period of presence state that is set manually. When the manual presence state period expires, the presence state changes to automatic and a notification is sent to other users of your new presence state. Your manual presence state expires based on the configuration in the Manual state expiration time section. For example, if you set your presence state manually to Busy, and the Manual state expiration time for Busy is set to 600, then your Busy presence state expires after 600 seconds and the presence state changes to automatic. When your presence state changes, a notification is sent to other presence users of your new presence state.