Unity NAS config with LACP

I would like to know whether it is possible to :

1. Create a LACP interface with only one ports.  The  reason is due to insufficient ports at the moment, I can only add additional physical port to the LACP interface after I have free up the used ports.

2. Is it possible to modify an existing LACP interface configuration?  For example add additional physical ports and remove certain physical port from LACP interface.