In Online mode, if your Post Office Agent shuts down or you lose your network connection, you temporarily lose your connection to your mailbox.
You should use this mode if you do not have a lot of network traffic, or if you use several different workstations and do not want to download a local mailbox to each one.
You might be able to run Group Wise in any of the four modes, or your Group Wise administrator might require that you use only a certain mode.
Most Group Wise features are available in all four Group Wise modes, with some exceptions.
Subscribing to other users’ notifications is not available in Caching mode.
Subscribing to other users’ notifications and Proxy are not available in Remote mode.
Any feature that requires a connection, such as to the Group Wise system or to an IMAP4 account, is not available in Remote (Offline) mode.