Accchhha.. moustashe sounds..

 

You said you brought him from Geometries. You need a different workflow for exporting him out of Poser's export window.

 Can you still use your sculpted obj from DAZ People in Geometries?

To be clear, you open ZB4. Double Document, Import/ Poser/ Runtime/ Geometries/ DazPeople/ renamed copy of your Michael OBJ.

Activate symmetry. Sculpt it. Reset it to subD1. Export to same location.

Then,

Load a new figure (M4, V4) into your workwindow.

Set 0 pose. IK off

Click Figure/Load Full Body Morph

Click on gray square

Find and doubleclick your Zbrushed Obj (rename if needed) ok

On new figure, scroll to bottom of parameters,, "community",,,  to "Other"

Set your FBM to 1.00