In theory you should be able to export a CIS/2 and then Advance Steel should be able to import it.

Am a little rusty on the AS side of things, but there will be a mapping procedure that translates unrecognized steel sections. Depending on how many sections are not recognized by AS, this may take some time.

Would recommend just sending them the frame of the structure. Have the detailer in AS add the relevant connections. AS wants welds and all sorts of other things along with Shop or Site bolts to determine the assemblies. Structure doesn't cater for any of this.