thanks for your replies. Looks like I missed this options as I use 3DC solely for texturing purposes atm and therefor only using the Texture\export.
I had a look into it and unfortunately it looks like this does not fit to my current workflow :/
I need a fixed name/path for my texture. Additionally I do not want 3DC to export the mesh again as it destroys custom data in the .fbx.
I found this which kind of fits to my needs. Is this in development?