Here is the command for smcli to expand an existing Logical Drive. I had to mix documentation from Dell, IBM, and SANtricity to get a working command line. The ; at the end of the line is required. i just ran smcli localhost and pasted the below command.
This is not the same as add capacity in the GUI.
Here is the command information to expand the drive in windows.
set logicaldrive["name or label of logical drive"] addCapacity=SizeinBytes;