Tech-support data can be exported from the GUI under the Admin tab -> Utilities, but it can also be collected via the CLI.
The following commands can be used from an SSH session into the server's CIMC to configure and start the collection of tech-support data:
set tftp-ip x.x.x.x
set path supportfile
You can view progress of the tech-support collection/upload by using the 'show detail' command repeatedly.