Use FBX Binary 2012 Binary or 2011 Binary.
If you are exporting a Genesis character, the new pose and expression DUF files are in C:\Program Files\Reallusion\iClone 8\Program\Assets\ExternalFiles\DazResource.
To use the expression animations applied in DAZ, you must import the FBX file again in the expression editor.

I was trying to Transform a Daz V4 character into CC4, but I am getting an error that says it's not compatible, but the specs for CC4 says that it's supposed to be able to Transform V4. I was able to do this in CC3 with V4 exported as an FBX and brought in via Transformer. Has anybody else been able to do this with CC4?

Update: never mind, I see there's more than one Transform button--you need to import V4 as CC, as before, not use the "big" Transform button.

On my Youtube Channel: Quest of the Key: Chapter One

FBX 2012 -- Binary